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Lee, Wen Zhao ; Ong, Duu Sheng ; Choo, Kan Yeep ; Yilmazoglu, Oktay ; Hartnagel, Hans L. (2021)
Monte Carlo evaluation of GaN THz Gunn diodes.
In: Semiconductor Science and Technology, 36 (12)
doi: 10.1088/1361-6641/ac2b4d
Article, Bibliographie
Sirkeli, Vadim P. ; Yilmazoglu, Oktay ; Hajo, Ahid S. ; Nedeoglo, Natalia D. ; Nedeoglo, Dmitrii D. ; Preu, Sascha ; Küppers, Franko ; Hartnagel, Hans L. (2018)
Enhanced Responsivity of ZnSe‐Based Metal–Semiconductor–Metal Near‐Ultraviolet Photodetector via Impact Ionization.
In: physica status solidi (RRL) – Rapid Research Letters, 12 (2)
doi: 10.1002/pssr.201700418
Article, Bibliographie
Küppers, Franko ; Sirkeli, Vadim P. ; Yilmazoglu, Oktay ; Al-Daffaie, Shihab ; Oprea, Ion ; Ong, Duu Sheng ; Hartnagel, Hans L. (2018)
Internal Quantum Efficiency Enhancement of InGaN/GaN LEDs WITH Mg-Si pin-Doped GaN Quantum Barrier.
9th International Conference on Materials Science and Condensed Matter Physics, Chisinau, Moldova.
Conference or Workshop Item, Bibliographie
Sirkeli, Vadim P. ; Yilmazoglu, Oktay ; Preu, Sascha ; Küppers, Franko ; Hartnagel, Hans L. (2018)
Proposal for a Monolithic Broadband Terahertz Quantum Cascade Laser Array Tailored to Detection of Explosive Materials.
In: Sensor Letters, 16 (1)
doi: 10.1166/sl.2018.3919
Article, Bibliographie
Sirkeli, V. P. ; Yilmazoglu, Oktay ; Ong, D. S. ; Preu, Sascha ; Küppers, F. ; Hartnagel, Hans L. (2017)
Resonant Tunneling and Quantum Cascading for Optimum Room-Temperature Generation of THz Signals.
In: IEEE Transactions on Electron Devices, 64 (8)
doi: 10.1109/TED.2017.2718541
Article, Bibliographie
Sirkeli, Vadim P. ; Yilmazoglu, Oktay ; Al-Daffaie, Shihab ; Preu, Sascha ; Küppers, Franko ; Hartnagel, Hans L. (2017)
1.33 THz room-temperature quantum cascade lasers based on ZnMgSe/ZnSe.
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2017 42nd International Conference on.
Conference or Workshop Item, Bibliographie
Sirkeli, Vadim P. ; Yilmazoglu, Oktay ; Al-Daffaie, Shihab ; Oprea, Ion ; Ong, Duu Sheng ; Küppers, Franko ; Hartnagel, Hans L. (2017)
Resonant tunneling transport in Zn x Be 1-x Se/ZnSe/Zn y Be 1-y Se asymmetric quantum structures.
Nanotechnology VIII.
Conference or Workshop Item, Bibliographie
Sirkeli, Vadim P. ; Yilmazoglu, Oktay ; Al-Daffaie, Shihab ; Oprea, Ion ; Ong, Duu Sheng ; Küppers, Franko ; Hartnagel, Hans L. (2016)
Efficiency enhancement of InGaN/GaN light-emitting diodes with pin-doped GaN quantum barrier.
In: Journal of Physics D: Applied Physics, 50 (3)
Article, Bibliographie
Sirkeli, Vadim P. ; Yilmazoglu, Oktay ; Küppers, Franko ; Hartnagel, Hans L. (2015)
Effect of p-NiO and n-ZnSe interlayers on the efficiency of p-GaN/n-ZnO light-emitting diode structures.
In: Semiconductor Science and Technology, 30 (065005)
Article, Bibliographie
Sirkeli, Vadim P. ; Yilmazoglu, Oktay ; Küppers, Franko ; Hartnagel, Hans L. (2015)
Effect of p-NiO Interlayer on Internal Quantum Efficiency of p-GaN/n-ZnO Light-Emitting Devices.
In: Journal of Nanoelectronics and Optoelectronics, 9 (6)
Article, Bibliographie
Hartnagel, Hans L. ; Al-Daffaie, Shihab (2015)
Graphene Plasmonics for the Enhancement of THz-Signal Transfer.
The 39th European Workshop on Compound Semiconductor Devices and Integrated Circuits.
Conference or Workshop Item, Bibliographie
Yilmazoglu, Oktay ; Evtukh, Anatoli ; Al-Daffaie, Shihab ; Biethan, Jens-Peter ; Pavlidis, Dimitris ; Litovchenko, Vladimir ; Hartnagel, Hans L. (2014)
Electron field emission from nanostructured semiconductors under photo illumination.
In: Turkish Journal of Physics, 38 (3)
Article, Bibliographie
Hartnagel, Hans L. ; Preu, Sascha (2014)
Graphene THz Circuitry by Nano-Constriction Designs.
WOCSDICE 2014.
Conference or Workshop Item, Bibliographie
Yilmazoglu, Oktay ; Al-Daffaie, Shihab ; Hartnagel, Hans L. ; Joshi, R. ; Yadav, S. ; Schneider, J. J. ; Nick, C. ; Thielemann, C. (2012)
CNT photocathodes based on GaAs high-frequency photoswitches.
Vacuum Nanoelectronics Conference (IVNC), 2012 25th International.
Conference or Workshop Item, Bibliographie
Koops, Hans W. P. ; Al-Daffaie, Shihab ; Hartnagel, Hans L. ; Rudzinski, A. (2012)
Development of a miniaturized Dynatron THz-Oscillator with a FEBIP system.
Vacuum Nanoelectronics Conference (IVNC), 2012 25th International.
Conference or Workshop Item, Bibliographie
Koops, Hans W. P. ; Rudzinski, Axel ; Nouvertné, Frank ; Al-Daffaie, Shihab ; Hartnagel, Hans L. (2012)
Portable 0.1 To 10 THz Radiation Source With Free Electron Beams.
3rd ITG Int. Vacuum Electronics Workshop Physikzentrum Bad Honnef , Germany.
Conference or Workshop Item, Bibliographie
Koops, Hans W. P. ; Al-Daffaie, Shihab ; Hartnagel, Hans L. (2012)
Portable source with free electron beams for 0.1 to 10 THZ.
In: Proceedings of WOCSDICE-EXMATEC
Article, Bibliographie
Al-Daffaie, Shihab ; Acedo, Pablo ; Hartnagel, Hans L. (2012)
Simulation of a CW THz camera scheme.
In: Proceedings of WOCSDICE-EXMATEC
Article, Bibliographie
Vicente, C. ; Wolk, D. ; Hartnagel, Hans L. ; Gimeno, B. ; Boria, V. E. ; Raboso, D. (2007)
Experimental analysis of passive intermodulation at waveguide flange bolted connections.
In: IEEE transactions on microwave theory and techniques, 55 (5)
doi: 10.1109/TMTT.2007.895400
Article, Bibliographie
Dragoman, M. ; Müller, A. ; Neculoiu, D. ; Konstantinidis, G. ; Grenier, K. ; Dubuc, D. ; Bary, L. ; Plana, R. ; Fourn, E. ; Flahaut, E. ; Hartnagel, Hans L. (2007)
Carbon nanotubes-based microwave and millimeter wave sensors.
Conference or Workshop Item, Bibliographie
Schoenherr, Daniel ; Sydlo, Cezary ; Goebel, Thorsten ; Feiginov, Michael N. ; Hartnagel, Hans L. ; Meissner, Peter ; Bach, H.-G. ; Kunkel, R. ; Mekonnen, G. G. ; Zhang, R. (2007)
Characterization of THz emitter based on a high-speed p-i-n photodiode.
Conference or Workshop Item, Bibliographie
Cojocari, Oleg ; Oprea, I. ; Sydlo, Cezary ; Zimmermann, R. ; Walber, A. ; Henneberger, R. ; Hartnagel, Hans L. (2007)
Design and characterization of Schottky structures for THz-applications.
In: Frequenz, 61
Article, Bibliographie
Litovchenko, V. ; Evtukh, A. ; Semenenko, M. ; Grigoriev, A. ; Yilmazoglu, Oktay ; Hartnagel, Hans L. ; Sirbu, L. ; Tiginyanu, I. M. ; Ursaki, V. V. (2007)
Electron field emission from narrow band gap semiconductors (InAs).
In: Semiconductor science and technology, 22
Article, Bibliographie
Nicolae, B. ; Chowdhury, D. Roy ; Hartnagel, Hans L. (2007)
Experimental and modelled configuration of double-barrier HBV based on Al0.7Ga0.3As/GaAs.
Conference or Workshop Item, Bibliographie
Ong, D. S. ; Hartnagel, Hans L. (2007)
Generation of THz signals based on quasi-ballistic electron reflections in double-heterojunction structures.
In: Semiconductor science and technology, 22
Article, Bibliographie
Halbritter, Hubert ; Sydlo, Cezary ; Koegel, Benjamin ; Riemenschneider, Frank ; Hartnagel, Hans L. ; Meissner, Peter (2007)
Impact of micromechanics on the linewidth and chirp performance of MEMS-VCSELs.
In: IEEE/LEOS journal of selected topics on quantum electronics, 13
Article, Bibliographie
Sigmund, Jochen ; Zogal, Karolina ; Lampin, J. F. ; Ivannikov, V. ; Sydlo, Cezary ; Feiginov, Michael N. ; Pavlidis, Dimitris ; Meissner, Peter ; Hartnagel, Hans L. (2007)
Low-temperature grown GaAsSb with sub-picosecond photocarrier lifetime for continuous-wave terahertz applications.
Conference or Workshop Item, Bibliographie
Neculoiu, D. ; Konstantinidis, G. ; Müller, A. ; Kostopoulos, A. ; Vasilache, D. ; Mutamba, Kabula ; Sydlo, Cezary ; Hartnagel, Hans L. ; Bary, L. ; Plana, R. (2007)
Microwave FBAR structures fabricated using micromachined GaN membranes.
Conference or Workshop Item, Bibliographie
Kunkel, R. ; Beling, A. ; Bach, H.-G. ; Mekonnen, G. G. ; Schmidt, D. ; Sydlo, Cezary ; Schoenherr, Daniel ; Feiginov, Michael N. ; Hartnagel, Hans L. ; Meissner, Peter (2007)
Monolithic integration of a waveguide-integrated p-i-n-photodiode and a planar antenna for THz applications.
Conference or Workshop Item, Bibliographie
Dragoman, M. ; Takacs, A. ; Muller, A. A. ; Hartnagel, Hans L. ; Plana, R. ; Grenier, K. ; Dubic, D. (2007)
Nanoelectromechanical switches based on carbon nanotubes for microwave and millimetre waves.
In: Applied physics letters, 90
Article, Bibliographie
Ong, D. S. ; Hartnagel, Hans L. (2007)
Novel concept for THz signals generations in heterostructures.
In: Physica status solidi / Rapid research letters, 1
Article, Bibliographie
Vicente, C. ; Hartnagel, Hans L. (2007)
Passive intermodulation at junctions.
Conference or Workshop Item, Bibliographie
Yilmazoglu, Oktay ; Hartnagel, Hans L. ; Pavlidis, Dimitris ; Evtukh, A. ; Litovchenko, V. ; Semenenko, M. ; Gorbanyuk, T. ; Grigoriev, A. (2007)
Pecularities of electron field emission from nanostructured GaN and AlGaN.
Conference or Workshop Item, Bibliographie
Nicolae, B. ; Chowdhury, D. Roy ; Pop, G. ; Hartnagel, Hans L. ; Pasquet, D. (2007)
The Planar Approach to a Al0.12Ga0.88N/GaN Based Double Barrier HBV.
In: Frequenz, 61
Article, Bibliographie
Dragoman, M. ; Cismaru, A. ; Müller, A. A. ; Dragoman, D. ; Hartnagel, Hans L. ; Plana, R. (2007)
RF NEMS-carbon-nanotube based nanoelectromechanical systems for microwave and millimeter wave applications.
8th International Symposium on RF MEMS and RF Microsystems (MEMSWAVE 2007). Barcelona (26.06.2007- 29.06.2007)
Conference or Workshop Item, Bibliographie
Goebel, Thorsten ; Schoenherr, Daniel ; Sydlo, Cezary ; Feiginov, Michael N. ; Meissner, Peter ; Hartnagel, Hans L. (2007)
Resonant metal gratings for THz material characterization.
Joint 32nd International Conference on Infrared and Millimeter Waves and the 15th International Conference on Terahertz Electronics. Cardiff, Wales, UK (02.09.2007-09.09.2007)
doi: 10.1109/ICIMW.2007.4516508
Conference or Workshop Item, Bibliographie
Nicolae, B. ; Chowdhury, D. Roy ; Hartnagel, Hans L. (2007)
S Parameter Measurements of Superlattice Heterostructure Barrier Junctions towards THz Varactors.
In: Frequenz, 61
Article, Bibliographie
Cojocari, Oleg ; Oprea, I. ; Sydlo, Cezary ; Zimmermann, R. ; Walber, A. ; Henneberger, R. ; Hartnagel, Hans L. (2007)
THz Schottky diodes on epitaxial AIGaAs-membrane.
2007 Joint 32nd International Conference on Infrared and Millimeter Waves and the 15th International Conference on Terahertz Electronics. Cardiff, UK (03.09.2007-07.09.2007)
doi: 10.1109/ICIMW.2007.4516711
Conference or Workshop Item, Bibliographie
Goebel, Thorsten ; Schoenherr, Daniel ; Feiginov, Michael N. ; Meissner, Peter ; Hartnagel, Hans L. (2007)
THz grating sensors for investigation of thin dielectric layers.
Conference on Lasers and Electro-Optics Europe (CLEO EUROPE 2007). München (17.06.2007-22.06.2007)
doi: 10.1109/CLEOE-IQEC.2007.4386396
Conference or Workshop Item, Bibliographie
Ong, D. S. ; Hartnagel, Hans L. (2007)
A new concept for THz frequency multipliers.
Conference or Workshop Item, Bibliographie
Cojocari, Oleg ; Hartnagel, Hans L. (2006)
Generalized model of the metal/n-GaN Schottky interface and improved performance by electrochemical Pt deposition.
In: Journal of Vacuum Science and Technology B, 24
Article, Bibliographie
Halbritter, Hubert ; Sydlo, Cezary ; Kögel, Benjamin ; Riemenschneider, F. ; Jatta, Sandro ; Hartnagel, Hans L. ; Meissner, Peter (2006)
Micromechanic effects and their impact on the characteristics of MEMS-tunable lasers.
IEEE/LEOS International Conference on Optical MEMS and Their Applications, 2006. Oulu, Finland (21.08.006-24.08.2006)
doi: 10.1109/OMEMS.2006.1708293
Conference or Workshop Item, Bibliographie
Mutamba, K. ; Yilmazoglu, Oktay ; Cojocari, Oleg ; Sydlo, Cezary ; Pavlidis, Dimitris ; Hartnagel, Hans L. (2006)
Technology of Wide-Bandgap Diode Struvtures for High Frequency Operation.
Conference or Workshop Item, Bibliographie
Mutamba, K. ; Sydlo, C. ; Yilmazoglu, O. ; Neculoiu, D. ; Konstantinidis, G. ; Georgakilas, A. ; Chatzopoulos, Z. ; Müller, A. ; Hartnagel, Hans L. (2006)
A new compound semiconductor technology for advanced RF MEMS applications.
Conference or Workshop Item, Bibliographie
Sydlo, Cezary ; Kögel, Benjamin ; Cojocari, Oleg ; Feiginov, Michael N. ; Hartnagel, Hans L. ; Meissner, Peter (2005)
Broadband power detector using a circularly-toothed planar logarithmic-periodic antenna.
Conference or Workshop Item, Bibliographie
Cojocari, Oleg ; Biber, S. ; Mottet, Bastian ; Rodriguez-Girones Arboli, Manuel ; Hartnagel, Hans L. ; Schmidt, L.-P. (2005)
DC and IF-noise performance optimisation of GaAs Schottky diodes for THz applications.
In: Semiconductor science and technology, 20
Article, Bibliographie
Cojocari, Oleg ; Sydlo, Cezary ; Hartnagel, Hans L. ; Tiginyanu, I. M. (2005)
Quasi-vertical Schottky-structures for THZ-Applications.
Conference or Workshop Item, Bibliographie
Mottet, B. ; Sydlo, Cezary ; Mutamba, ; Cojocari, Oleg ; Hartnagel, Hans L. (2005)
RF and thermal design of compound semiconductor devices using MEMS approach.
In: Frequenz, 59
Article, Bibliographie
Sigmund, Jochen ; Sydlo, Cezary ; Hartnagel, Hans L. ; Benker, Nathalie ; Fuess, Hartmut ; Rutz, F. ; Kleine-Ostmann, T. ; Koch, M. (2005)
Structure investigation of low-temperature-grown GaAsSb : a material for photoconductive terahertz antennas.
In: Applied physics letters, 87
Article, Bibliographie
Biber, S. ; Cojocari, Oleg ; Rehm, G. ; Mottet, Bastian ; Schmidt, L.-P. ; Hartnagel, Hans L. (2004)
A novel system for systematic microwave noise and DC characterization of terahertz Schottky diodes.
In: IEEE Transactions on Instrumentation and Measurement, 53 (2)
doi: 10.1109/TIM.2003.820487
Article, Bibliographie
Vincze, A. ; Kovac, J. ; Srnanek, R. ; Sigmund, Jochen ; Hartnagel, Hans L. ; Irmer, G. (2004)
Annealing behaviour of low temperature grown GaAs investigated by raman spectroscopy.
Conference or Workshop Item, Bibliographie
Vincze, A. ; Michalka, M. ; Podskocova, J. ; Sigmund, Jochen ; Kovac, J. ; Hartnagel, Hans L. (2004)
Annealing investigation of LT GaAs with AFM.
Conference or Workshop Item, Bibliographie
Sydlo, Cezary ; Kögel, Benjamin ; Cojocari, Oleg ; Hartnagel, Hans L. ; Meissner, Peter (2004)
Characterisation of a circularly-toothed planar logarithmic-periodic antenna for broadband power detection.
In: Frequenz, 58 (9/10)
doi: 10.1515/FREQ.2004.58.9-10.207
Article, Bibliographie
Mendis, Rajind ; Sydlo, Cezary ; Sigmund, Jochen ; Feiginov, Michael N. ; Meissner, Peter ; Hartnagel, Hans L. (2004)
Coherent generation and detection of continuous THz waves using two photomixers driven by laser diodes.
Conference or Workshop Item, Bibliographie
Mendis, R. ; Sydlo, Cezary ; Sigmund, Jochen ; Feiginov, Michael N. ; Meissner, Peter ; Hartnagel, Hans L. (2004)
Continuous-wave terahertz system for spectroscopy and imaging.
Conference or Workshop Item, Bibliographie
Evtukh, A. A. ; Hartnagel, Hans L. ; Litovchenko, V. G. ; Semenenko, M. O. ; Yilmazoglu, Oktay (2004)
Enhancement of electron field emission stability by nitrogen-doped diamond-like carbon film coating.
In: Semiconductor science & technology, 19
Article, Bibliographie
Cojocari, Oleg ; Biber, S. ; Mottet, Bastian ; Hartnagel, Hans L. ; Schmidt, L.-P. (2004)
GaAs Schottky diode fabrication for THz-frequency mixer applications.
Conference or Workshop Item, Bibliographie
Handel, P. H. ; Hartnagel, Hans L. ; Sia, K. E. ; Mishra, U. K. ; York, R. (2004)
GaN HEMT geometry and piezoelectric quantum 1/f noise.
Conference or Workshop Item, Bibliographie
Cojocari, Oleg ; Popa, V. ; Ursaki, V. V. ; Tiginyanu, I. M. ; Hartnagel, Hans L. ; Daumiller, I. (2004)
GaN Schottky multiplier diodes prepared by electroplating : a study of passivation technology.
In: Semiconductor science and technology, 19
Article, Bibliographie
Saglam, Mustafa ; Irvine, A. C. ; Hartnagel, Hans L. (2004)
Heterostructure barrier varactors on gold substrate.
Conference or Workshop Item, Bibliographie
Cojocari, Oleg ; Biber, S. ; Mottet, Bastian ; Sydlo, Cezary ; Hartnagel, Hans L. ; Schmidt, L.-P. (2004)
IF-noise improvement of the GaAs Schottky diodes for THz-frequency mixer applications.
Conference or Workshop Item, Bibliographie
Zverev, V. N. ; Muhammad, M. ; Rahman, S. ; Debray, P. ; Saglam, Mustafa ; Sigmund, Jochen ; Hartnagel, Hans L. (2004)
Magnetotransport properties of two-dimensional electron gas in AlSb/InAs quantum well structures designed for device applications.
In: Journal of applied physics, 96
Article, Bibliographie
Schür, J. ; Biber, S. ; Gumbmann, F. ; Mottet, Bastian ; Cojocari, Oleg ; Schmidt, L.-P. ; Hartnagel, Hans L. (2004)
Micromachined split-block Schottky-diode mixer for 600GHz.
Conference or Workshop Item, Bibliographie
Cojocari, Oleg ; Popa, V. ; Ursaki, V. V. ; Tiginyanu, I. M. ; Mutamba, Kabula ; Saglam, Mustafa ; Hartnagel, Hans L. (2004)
Micrometer-size GaN Schottky-diodes for MM-wave frequency multipliers.
Conference or Workshop Item, Bibliographie
Dehé, Alfons ; Beilenhoff, Klaus ; Fricke, Klaus ; Klingbeil, Harald ; Krozer, Viktor ; Hartnagel, Hans L.
ed.: Webster, John G. (2004)
Microwave measurement.
In: Electrical measurements, signal processing and displays
Book Section, Bibliographie
Vicente, C. ; Mattes, M. ; Cervello, A. ; Wolk, D. ; Mottet, Bastian ; Hartnagel, Hans L. ; Mosig, J. ; Raboso, D. (2004)
Multipactor and corona discharge, prediction in rectangular waveguide based microwave components.
Conference or Workshop Item, Bibliographie
Vicente, C. ; Mattes, M. ; Cervello, A. ; Wolk, D. ; Mottet, Bastian ; Hartnagel, Hans L. ; Mosig, J. R. ; Raboso, D. (2004)
Prediction of corona discharge : towards a simulation tool for arbitrary geometries.
Conference or Workshop Item, Bibliographie
Litovchenko, V. G. ; Evtukh, A. A. ; Kryuchenko, Yu. ; Goncharuk, N. M. ; Yilmazoglu, Oktay ; Mutamba, Kabula ; Hartnagel, Hans L. ; Pavlidis, Dimitris (2004)
Quantum size resonance tunneling in the field emission phenomenon.
In: Journal of applied physics, 96
Article, Bibliographie
Altes, A. ; Mutamba, Kabula ; Heiderhoff, R. ; Hartnagel, Hans L. ; Balk, L. J. (2004)
Scanning near field thermal microscopy on a micromachined thin membrane.
In: Superlattices and Microstructures, 35 (3-6)
doi: 10.1016/j.spmi.2003.09.008
Article, Bibliographie
Mendis, R. ; Sydlo, Cezary ; Sigmund, Jochen ; Feiginov, Michael N. ; Meissner, Peter ; Hartnagel, Hans L. (2004)
Tunable CW-THz system with LTG-GaAs based log-periodic emitter.
Conference or Workshop Item, Bibliographie
Mendis, R. ; Sydlo, Cezary ; Sigmund, Jochen ; Feiginov, Michael N. ; Meissner, Peter ; Hartnagel, Hans L. (2004)
Tunable CW-THz system with a log-periodic photoconductive emitter.
Conference or Workshop Item, Bibliographie
Mendis, R. ; Sydlo, Cezary ; Sigmund, Jochen ; Feiginov, Michael N. ; Meissner, Peter ; Hartnagel, Hans L. (2004)
Tunable CW-THz system with a log-periodic photoconductive emitter.
In: Solid-state electronics, 48
Article, Bibliographie
Mottet, Bastian ; Sydlo, Cezary ; Kögel, Benjamin ; Robillard, Q. de ; Cojocari, Oleg ; Hartnagel, Hans L. (2004)
The impact of process optimisation on planar THz-Schottky device reliability.
Conference or Workshop Item, Bibliographie
Cojocari, Oleg ; Biber, S. ; Rodriguez-Girones Arboli, Manuel ; Mottet, Bastian ; Marchand, L. ; Schmidt, L.-P. ; Hartnagel, Hans L. (2004)
A new structural approach for uniform sub-micrometer anode metallization of planar THz Schottky components.
In: Semiconductor science & technology, 19
Article, Bibliographie
Biber, S. ; Cojocari, Oleg ; Rehm, G. ; Mottet, Bastian ; Schmidt, L.-P. ; Hartnagel, Hans L. (2004)
A novel system for systematic IF noise and DC characterization of THz Schottky diodes.
In: IEEE Transactions on Instrumentation and Measurement, 53 (2)
doi: 10.1109/TIM.2003.820487
Article, Bibliographie
Yilmazoglu, Oktay ; Pavlidis, Dimitris ; Litvin, Yu. M. ; Hubbard, S. M. ; Tiginyanu, I. M. ; Mutamba, Kabula ; Hartnagel, Hans L. ; Litovchenko, V. G. ; Evtukh, A. A. (2003)
Field emission from quantum size GaN structures.
In: Applied Surface Science, 220 (1-4)
doi: 10.1016/S0169-4332(03)00750-5
Article, Bibliographie
Litovchenko, V. G. ; Evtukh, A. A. ; Litvin, Yu. M. ; Goncharuk, N. M. ; Hartnagel, Hans L. ; Yilmazoglu, Oktay ; Pavlidis, Dimitris (2003)
Peculiarities of the electron field emission from quantum-size structures.
In: Applied Surface Science, 215 (1-4)
doi: 10.1016/S0169-4332(03)00283-6
Article, Bibliographie
Hartnagel, Hans L. (2003)
Electron emission modulation effects in microsize structures.
In: Semiconductor physics, quantum electronics and optoelectronics, 6 (1)
doi: 10.15407/spqeo6.01.062
Article, Bibliographie
Hartnagel, Hans L. ; Rodriguez-Gironés Arboli, Manuel (2003)
Current status and future prospects of semiconductor terahertz electronics.
In: IEICE transactions on electronics, E86-C (10)
Article, Bibliographie
Saglam, Mustafa ; Sigmund, Jochen ; Hartnagel, Hans L. (2003)
Einflüsse der Deckschichten auf die Ladungsträgerkonzentration und Elektronenbeweglichkeit in MBE-gewachsenen AlSb/InAs-Quantentöpfe.
Conference or Workshop Item, Bibliographie
Evtukh, A. A. ; Litovchenko, V. G. ; Litvin, Yu. M. ; Hartnagel, Hans L. ; Yilmazoglu, Oktay (2003)
Field emission from SiOx films deposited on Si and GaAs tip arrays.
Conference or Workshop Item, Bibliographie
Saglam, Mustafa ; Schumann, B. ; Dure, K. ; Domoto, C. ; Megej, Alexander ; Rodriguez-Gironés Arboli, Manuel ; Müller, J. ; Judaschke, R. ; Hartnagel, Hans L. (2003)
High performance 450 GHz GaAs-based heterostructure barrier varactor tripler.
In: IEEE electron device letters, 24
Article, Bibliographie
Miao, Jianmin ; Hartnagel, Hans L. (2003)
High-energy ion implantation : an alternative technology for micromachining 3-dimensional GaAs structures.
Book, Bibliographie
Saglam, Mustafa ; Mutamba, Kabula ; Megej, Alexander ; Sydlo, Cezary ; Hartnagel, Hans L. ; Daumiller, I. (2003)
Influence of polarization chages in Al 0.4 Ga 0.6 N/GaN barrier varactors.
In: Applied physics letters, 82
doi: 10.1063/1.1537516
Article, Bibliographie
Sigmund, Jochen ; Karova, K. ; Miehe, Gerhard ; Saglam, Mustafa ; Hartnagel, Hans L. ; Fuess, Hartmut (2003)
Investigation of a growth interruption under an As flux at AlSb/InAs interfaces with InSb bonds.
In: Journal of crystal growth
Article, Bibliographie
Valakh, M. Ya. ; Litovchenko, V. G. ; Strelchuk, V. V. ; Hartnagel, Hans L. ; Sigmund, Jochen (2003)
Manifestation of the intersubband plasmon-phonon excitations and the pecularities of interfaces in the Raman spectra of InAs/AlSb quantum well structures.
Conference or Workshop Item, Bibliographie
Ensling, David ; Hunger, Ralf ; Kraft, Daniel ; Mayer, Thomas ; Jaegermann, Wolfram ; Rodriguez-Girones Arboli, Manuel ; Ichizli, Victoria M. ; Hartnagel, Hans L. (2003)
Pulse Plating of Pt on n-GaAs(100) Wafer Surfaces: Synchrotron Induced Photoelectron Spectroscopy and XPS of Wet Fabrication Processes.
In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 200
doi: 10.1016/S0168-583X(02)01735-4
Article, Bibliographie
Biber, S. ; Schmidt, L.-P. ; Cojocari, Oleg ; Mottet, Bastian ; Rodriguez-Girones Arboli, Manuel ; Hartnagel, Hans L. (2003)
Systematic quality assessment of Schottky diodes for THz-applications.
Conference or Workshop Item, Bibliographie
Mendis, R. ; Sydlo, Cezary ; Sigmund, Jochen ; Feiginov, Michael N. ; Meissner, Peter ; Hartnagel, Hans L. (2003)
Tunable CW-THz system with a log-periodic photoconductive emitter.
Conference or Workshop Item, Bibliographie
Cojocari, Oleg ; Mottet, Bastian ; Rodriguez-Girones Arboli, Manuel ; Biber, S. ; Schmidt, L.-P. ; Hartnagel, Hans L. (2003)
Whisker-device-based optimisation of fabrication process for planar THz Schottky diode.
Conference or Workshop Item, Bibliographie
Saglam, Mustafa ; Schumann, B. ; Müllerwiebus, V. ; Megej, Alexander ; Auer, U. ; Rodriguez-Girones Arboli, Manuel ; Judaschke, R. ; Tegude, F. J. ; Hartnagel, Hans L. (2002)
450 GHZ mm-wave signal from frequency tripler with heterostructure barrier varactors on gold substrate.
In: Electronics letters, 38 (13)
Article, Bibliographie
Litovchenko, V. G. ; Evtukh, A. A. ; Goncharuk, N. M. ; Litvin, Yu. M. ; Hartnagel, Hans L. ; Yilmazoglu, Oktay (2002)
Anomalous field emission from quantum size structure.
Conference or Workshop Item, Bibliographie
Sydlo, Cezary ; Sigmund, Jochen ; Hartnagel, Hans L. ; Loata, G. ; Siebert, K. J. ; Roskos, H. G. (2002)
Efficient THz-emitters for low-temperature-grown GaAs photomixers.
Conference or Workshop Item, Bibliographie
Saglam, Mustafa ; Leo, E. ; Bozzi, M. ; Perregrini, L. ; Rodriguez-Girones Arboli, Manuel ; Arcioni, P. ; Hartnagel, Hans L. (2002)
Fabrication, testing and lumped element modeling of planar heterostructure barrier varactors.
Conference or Workshop Item, Bibliographie
Yilmazoglu, Oktay ; Pavlidis, Dimitris ; Litvin, Yu. M. ; Hubbard, S. M. ; Tiginyanu, I. ; Mutamba, Kabula ; Hartnagel, Hans L. ; Litovchenko, V. G. ; Evtukh, A. A. (2002)
Field emission from quantum size GaN whiskers.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. ; Mutamba, Kabula ; Pfeiffer, J. (2002)
III-V compound MEMS and optical communication tunable filters.
In: Micromachined microwave devices and circuits.- [Bucuresti]: Ed. Acad. Romane, 2002.- ISBN 973-27-0908-1.- S. 10-23
Article, Bibliographie
Sigmund, Jochen ; Saglam, Mustafa ; Hartnagel, Hans L. ; Miehe, Gerhard ; Fuess, Hartmut (2002)
Influence of growth interruptions at AlSb/InAs interfaces on the atomic morphology and electron transport properties.
Conference or Workshop Item, Bibliographie
Megej, Alexander ; Beilenhoff, Klaus ; Schuessler, M. ; Ziroff, A. ; Mottet, Bastian ; Yilmazoglu, Oktay ; Mutamba, Kabula ; Hamann, C. D. ; Baican, R. ; Hartnagel, Hans L. (2002)
Integrated microwave sensor for cavity-length measurement in machine engineering.
In: IEEE transactions on microwave theory and techniques, 5 (12)
Article, Bibliographie
Megej, Alexander ; Beilenhoff, Klaus ; Schuessler, M. ; Ziroff, A. ; Mottet, Bastian ; Yilmazoglu, Oktay ; Mutamba, Kabula ; Hamann, C. D. ; Baican, R. ; Hartnagel, Hans L. (2002)
Integrated microwave sensor for cavity-length measurement with sub-millimeter accuracy.
Conference or Workshop Item, Bibliographie
eds.: Isermann, Rolf ; Breuer, Bert ; Hartnagel, Hans L. (2002)
Mechatronische Systeme für den Maschinenbau : Ergebnisse aus dem Sonderforschungsbereich 241 ...
Book, Bibliographie
Hartnagel, Hans L. ; Mutamba, Kabula (2002)
Power sensors for microwave and millimeter-wave frequencies.
Conference or Workshop Item, Bibliographie
Ichizli, Victoria M. ; Rodriguez-Girones Arboli, Manuel ; Marchand, L. ; Garden, C. ; Cojocari, Oleg ; Mottet, Bastian ; Hartnagel, Hans L. (2002)
Process control and failure analysis implementation for THz Schottky-based components.
Conference or Workshop Item, Bibliographie
Ichizli, Victoria M. ; Rodriguez-Girones Arboli, Manuel ; Marchand, L. ; Garden, C. ; Cojocari, Oleg ; Mottet, Bastian ; Hartnagel, Hans L. (2002)
Process control methods for THz Schottky-based components.
Conference or Workshop Item, Bibliographie
Sydlo, Cezary ; Saglam, Mustafa ; Mottet, Bastian ; Rodriguez-Girones Arboli, Manuel ; Hartnagel, Hans L. (2002)
Reliability investigations on HBV using pulsed electrical stress.
In: Microelectronics reliability, 42
Article, Bibliographie
Sigmund, Jochen ; Saglam, Mustafa ; Hartnagel, Hans L. ; Zverev, V. N. ; Raichev, O. E. ; Debray, P. ; Miehe, Gerhard ; Fuess, Hartmut (2002)
Structural and transport characterization of AISb/InAs QW structures grown by MBE with two growth interruptions.
In: Journal of vacuum science & technology / B, 20
Article, Bibliographie
Hartnagel, Hans L. ; Ichizli, V. ; Rodriguez-Girones Arboli, Manuel (2002)
Surface, interface issues in THz electronics.
In: Applied surface science, 190
Article, Bibliographie
Mutamba, Kabula ; Megej, Alexander ; Beilenhoff, Klaus ; Weinzierl, J. ; Hartnagel, Hans L. (2002)
Technology of compound semiconductor MEMS for millimeter-wave power measurement.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. ; Mutamba, Kabula ; Brandt, Michael ; Yilmazoglu, Oktay (2002)
Verbindungshalbleitersensorik für mechatronische Systeme.
In: Mechatronische Systeme für den Maschinenbau : Ergebnisse aus dem SFB 241 "Integrierte mechanisch-elektronische Systeme für den Maschinenbau" (IMES)
Book Section, Bibliographie
Litvin, Yu. M. ; Evtukh, A. A. ; Yilmazoglu, Oktay ; Hartnagel, Hans L. (2002)
The influence of the self-organization nano-size structures on the electron field emission.
Conference or Workshop Item, Bibliographie
Debray, P. ; Zverev, V. N. ; Raichev, O. E. ; Hartnagel, Hans L. ; Sigmund, Jochen ; Saglam, Mustafa ; Kohn, E. ; Densienko, A. ; Ahmed, H. ; Irvine, A. C. ; Lee, S.-B. (2002)
A nanoscale electron waveguide for very high-speed analog-to-digital converters.
Conference or Workshop Item, Bibliographie
Lohrberg, H. ; Stoffel, B. ; Voß, B.
eds.: Isermann, Rolf ; Breuer, Bert ; Hartnagel, Hans L. ; Deutsche Forschungsgemeinschaft (2002)
Im Laufrad integrierte Messung der Kavitationsaggressivität in Turbomaschinen.
In: Mechatronische Systeme für den Maschinenbau : Ergebnisse aus dem Sonderforschungsbereich 241 "Integrierte Mechanisch-elektronische Systeme für den Maschinenbau (IMES)"
Book Section, Bibliographie
Mimura, H. ; Yilmazoglu, Oktay ; Shimawaki, H. ; Yokoo, K. ; Mutamba, K. ; Hartnagel, Hans L. (2001)
Emission characteristics of a gallium arsenide wedge emitter monolithically fabricated with an air-bridge and a cantilever anode.
Conference or Workshop Item, Bibliographie
Yokoo, K. ; Okamura, K. ; Hasegawa, H. ; Mimura, H. ; Yilmazoglu, Oktay ; Mutamba, Kabula ; Hartnagel, Hans L. ; Ishizuka, H. ; Kawamura, Y. (2001)
Experiments of microwave and optical wave radiation using field emission micro cathode.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. ; Megej, A. ; Mutamba, K. (2001)
Microwave and millimeter-wave monolithic signal sources with MEMS-based power monitoring for sensing applications.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. ; Ichizli, Victoria M. ; Rodriguez-Girones Arboli, Manuel (2001)
Semiconductor technology for THz integration.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. ; Ichizli, Victoria M. ; Rodriguez-Girones Arboli, Manuel (2001)
Surface/interface issues in THz electronics.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. ; Yilmazoglu, Oktay ; Mutamba, Kabula (2000)
Concepts of microwave power electronics based on electron field emission from structures fabricated in semiconducting materials.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. ; Pfeiffer, J. ; Peerlings, J. ; Samal, N. ; Meissner, P. (2000)
Fabry-Pérot filter for WDM.
Conference or Workshop Item, Bibliographie
Yokoo, K. ; Okamura, K. ; Mimura, H. ; Yilmazoglu, Oktay ; Arslan, D. ; Hartnagel, Hans L. ; Ishizuka, H. (2000)
Field emission studies for microwave and optical wave generation.
Conference or Workshop Item, Bibliographie
Lin, Chih-I. ; Ichizli, Victoria M. ; Rodriguez-Girones Arboli, Manuel ; Saglam, Mustafa ; Szeliga, P. ; Hartnagel, Hans L. (2000)
From honey-comb to SMMIC: Schottky diodes at TU Darmstadt.
Conference or Workshop Item, Bibliographie
Mimura, H. ; Okamura, K. ; Shimawaki, H. ; Yokoo, K. ; Yilmazoglu, Oktay ; Hartnagel, Hans L. (2000)
GaAs lateral field emitters for generation of modulation beam using gunn effect.
Conference or Workshop Item, Bibliographie
Saglam, Mustafa ; Megej, A. ; Sigmund, Jochen ; Rodriguez-Girones Arboli, Manuel ; Mutamba, Kabula ; Ichizli, Victoria M. ; Lin, C.-I. ; Hartnagel, Hans L. (2000)
III-V Material systems for heterostructure barrier varactors.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. ; Mutamba, K. ; Pfeiffer, J. (2000)
III-V compound materials for MEMS including filters.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. ; Mutamba, Kabula ; Yilmazoglu, Oktay (2000)
New aspects of quantum electronics based MEMS.
Conference or Workshop Item, Bibliographie
Mottet, Bastian ; Sydlo, Cezary ; Hartnagel, Hans L. (2000)
Pulsed electrical stress techniques for the detection of non-thermal lifetime-problems with semiconductor devices and their IC's.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. ; Lin, C. I. ; Rodriguez-Girones, M. ; Ichizli, V. ; Saglam, M. ; Szeliga, P. (2000)
Recent development in device technology for integrated THz circuits.
Conference or Workshop Item, Bibliographie
Lin, Chih-I. ; Saglam, Mustafa ; Rodriguez-Girones Arboli, Manuel ; Ichizli, Victoria M. ; Szeliga, P. ; Hartnagel, Hans L. (2000)
Recent development of Pt/n-GaAs Schottky diodes for THz applications.
Conference or Workshop Item, Bibliographie
Lin, Chih-I. ; Rodriguez-Girones Arboli, Manuel ; Ichizli, Victoria M. ; Saglam, Mustafa ; Szeliga, P. ; Hartnagel, Hans L. (2000)
Technological developments for THz electronics.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. ; Mutamba, Kabula ; Brandt, M. ; Yilmazoglu, Oktay (2000)
Verbindungshalbleitersensoren für mechatronische Systeme.
In: Thema Forschung, 6
Article, Bibliographie
Hartnagel, Hans L. ; Brandt, M. ; Mayer, K. ; Mutamba, Kabula ; Yilmazoglu, Oktay ; Megej, Alexander ; Lin, C. I. ; Rodriguez, M. (1999)
Contact free sensor signal transfer by microwave and RF links.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. ; Pfeiffer, J. ; Mutamba, K. ; Peerlings, J. ; Riemenschneider, R. ; Meißner, P. (1999)
III-V Membrane structures for tunable Fabry-Pérot filters and sensor applications.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. ; Mutamba, K. ; Brandt, M. ; Pfeiffer, J. ; Riemenschneider, R. ; Meißner, P. ; Breuer, B. ; Hennecke, Dietmar K. ; Stoffel, B. (1999)
III-V-Micromechanics for sensing applications in mechanical engineering and for optical communications.
Conference or Workshop Item, Bibliographie
Pfeiffer, Joachim ; Peerlings, J. ; Riemenschneider, Rolf ; Genovese, R. ; Aziz, M. ; Böhm, G. ; Amann, Markus-Christian ; Meissner, Peter ; Hartnagel, Hans L. (1999)
InP-based bulk-micromachined tunable filter applications for WDM systems.
In: SPIE Photonics East <1999, Boston>: Proceedings
Book Section, Bibliographie
Hartnagel, Hans L. ; Mutamba, K. ; Pfeiffer, J. ; Riemenschneider, R. ; Peerlings, J. (1999)
MEMS for sensing and optical communication systems.
In: Compound semiconductor, 5
Article, Bibliographie
Hartnagel, Hans L. ; Lin, C. I. (1999)
Passivation of compound-semiconductor surfaces for low-noise terahertz devices.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. (1999)
Proposal of a new type of non-linear component for harmonic extraction.
In: Frequenz, 53
Article, Bibliographie
Hartnagel, Hans L. (1999)
THz-device technology for monolithic integration using III-V semiconductors.
International Conference Terahertz Electronics. Nara, Japan (7.1999)
Conference or Workshop Item, Bibliographie
Krozer, Viktor ; Brandt, Michael ; Schüßler, Martin ; Hartnagel, Hans L. (1998)
Application of transmission line pulses for reliability characterisation of high temperature devices.
4th International High Temperature Electronics Conference (HiTEC '98). Albuquerque, NM, USA (14.06.1998-18.06.1998)
doi: 10.1109/HITEC.1998.676775
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. ; Arslan, D. ; Brandt, M. ; Dehé, A. ; Mutamba, K. ; Vogt, A. (1998)
Compound semiconductor microsensors for applications in mechanical engineering.
Gallium Arsenide Applications Symposium. GAAS'98. Amsterdam, Nederlands (05.10.1998-06.10.1998)
Conference or Workshop Item, Bibliographie
Riemenschneider, Rolf ; Peerlings, Joachim ; Pfeiffer, Joachim ; Dehé, A. ; Vogt, Andreas ; Meißner, Peter M. ; Hartnagel, Hans L. ; Chitica, N. ; Daleiden, Jürgen ; Streubel, Klaus P. ; Künzel, Harald ; Goertz, W. (1998)
Mechanical-optical analysis of InP-based Bragg Membranes for selective tunable WDM receivers.
doi: 10.1117/12.302395
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. ; Brandt, M. ; Dehé, A. ; Simon, Ansgar (1998)
Mikro-Sensorik für den Einsatz in Maschinen bis hin zum Satelliten.
In: Thema Forschung, (1)
Article, Bibliographie
Hartnagel, Hans L. ; Mutamba, ; Sigurdardottir, A. (1998)
A basic quantum dot element: proposal of a HBT-dot cell for high-packing density memory circuits.
Conference or Workshop Item, Bibliographie
Klingbeil, Harald ; Beilenhoff, Klaus ; Hartnagel, Hans L. (1997)
Analyse und Modellierung der Leiterverluste von Luftbrücken für MMIC-typische Komplanarleitungen.
MIOP '97: 9. Kongressmesse für Hochfrequenztechnik, Funkkommunikation und Elektromagnetische Verträglichkeit. Sindelfingen (22.04.1997-24.04.1997)
Conference or Workshop Item, Bibliographie
Grajal, J. ; Krozer, V. ; Schuessler, M. ; Brandt, M. ; Hartnagel, Hans L. (1997)
Application of semiconductor interface modelling to reliability characterisation.
Conference or Workshop Item, Bibliographie
Henkel, Achim ; Delage, Sylvain Laurent ; Forte-Poisson, Marie-Antoinette di ; Chartier, E. ; Blanck, Hervé ; Hartnagel, Hans L. (1997)
Collector-up InGaP/GaAs-double heterojunction bipolar transistors with high fmax.
In: Electronics Letters, 33 (7)
Article, Bibliographie
Niranjana, S. ; Goswami, S. N. N. ; Lal, K. ; Vogt, Alexander ; Hartnagel, Hans L.
ed.: Kumar, Vikram (1997)
Determination of crystalline perfection and lattice-mismatch between gallium antimonide epitaxial films and gallium arsenide substrates.
9. International Workshop on Physics of Semiconductor Devices. New Delhi, India (16.12.1997-20.12.1997)
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. (1997)
III-V-compounds for high temperature operation.
In: Materials science and engineering. B 46 (1997), S. 47-51
Article, Bibliographie
Dehé, Alfons ; Pavlidis, Dimitris ; Hong, K. S. ; Hartnagel, Hans L. (1997)
InGaAs/InP thermoelectric infrared sensor utilizing surface bulk micromachining technology.
In: IEEE Transactions on Electron Devices, 44 (7)
doi: 10.1109/16.595931
Article, Bibliographie
Hartnagel, Hans L. (1997)
New devices for millimeter-wave applications.
In: Annales des télécommunications. 52 (1997), No. 3-4
Article, Bibliographie
Vogt, Alexander ; Hartnagel, Hans L. ; Rodewald, M. ; Fuess, H. ; Ressel, P. ; Vogel, K. ; Würfl, J. (1997)
Pd-based Ohmic contacts to GaSb.
21st Workshop on Compound Semiconductor Devices and Integrated Circuits (WOCSDICE'97). Scheveningen, The Netherlands (25.05.1997-28.05.1997)
Conference or Workshop Item, Bibliographie
Klingbeil, Harald ; Beilenhoff, Klaus ; Hartnagel, Hans L. (1997)
Rigorous numerical simulation and modeling of coplanar discontinuities.
International IEEE Workshop on Experimentally based FET Device Modelling and Related Nonlinear Circuit Design. Kassel (17.07.1997-18.07.1997)
Conference or Workshop Item, Bibliographie
Simon, Ansgar ; Hartnagel, Hans L. (1997)
Schottky diode developments for submillimeter wave applications.
In: IEEE-MTT/AP German newsletter, 1 (9)
Article, Bibliographie
Tiginyanu, I. ; Pavlidis, D. ; Cao, J. ; Eisenbach, A. ; Ichizli, Victoria M. ; Hartnagel, Hans L. ; Anedda, A. ; Corpino, R. (1997)
Time-resolved photoluminescence characterisation of GaN layers grown by metalorganic chemical vapor deposition.
Conference or Workshop Item, Bibliographie
Brandt, Michael ; Schüßler, Martin ; Lin, C. ; Simon, Ansgar ; Hartnagel, Hans L.
ed.: Kaldeich-Schürmann, Brigitte (1997)
Transmission line pulse based reliability investigations of THz Schottky diodes.
3. ESA Electronic Components Conference. Noordwijk, NL (22.04.1997-25.04.1997)
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. (1997)
Ultra-small quantum devices for memory and logic.
International Solid State Circuits Conference. San Francisco (1997)
Conference or Workshop Item, Bibliographie
Miao, Jianmin ; Tiginyanu, I. M. ; Hartnagel, Hans L. (1997)
The characteristics of high-resistance layers produced in n-GaAs using MeV-nitrogen implantation for three-dimensional structuring.
In: Applied Physics Letters, 70 (7)
doi: 10.1063/1.118222
Article, Bibliographie
Schuessler, M. ; Statzner, T. ; Granero, S. ; Hartnagel, Hans L. (1997)
A new self aligned technique for HBTs using electrolytical deposition of base metal.
5th European Gallium Arsenide and Related III-V Compounds Applications Symposium (GAAS 97). Bologna, Italy (03.09.1997-05.09.1997)
Conference or Workshop Item, Bibliographie
Gleeson, P. ; Pike, J. ; Maaskant, P. P. ; Kelly, W. M. ; Simon, A. ; Lin, C. I. ; Hartnagel, Hans L. (1997)
GaAs Schottky diodes for THz applications.
22. International Conference on Infrared and MM Waves. Wintergreen (07.09.1997-11.09.1997)
Conference or Workshop Item, Bibliographie
Behner, Ulrich ; Haug, R. ; Schütz, R. ; Hartnagel, Hans L.
ed.: Hornung, T. (1997)
Untersuchung von anisotrop elektrisch leitfähigen Klebstoffen mit 1/f-Rauschmessungen.
International Society for Hybrid Microelectronics: German ISHM Conference. München (13.10.1997-13.10.1997)
Conference or Workshop Item, Bibliographie
Krozer, Viktor ; Ruppert, Markus ; Schüßler, Martin ; Fricke, Klaus ; Lee, Woo-Yong ; Hartnagel, Hans L. (1996)
Calculation of the power capabilities of HBT amplifiers based on a new physical HBT model.
In: International Journal of Microwave and Millimeter-Wave Computer-Aided Engineering, 6 (4)
doi: 10.1002/(SICI)1522-6301(199607)6:4<270::AID-MMCE6>3.0.CO;2-R
Article, Bibliographie
Hartnagel, Hans L. (1996)
Are new device and material concepts needed in the future?
Conference or Workshop Item, Bibliographie
Iida, Tsutomu ; Makita, Yunosuke ; Shima, Takayuki ; Kimura, Shinji ; Horn, Joachim ; Hartnagel, Hans L. ; Uekusa, Shin‐ichiro (1996)
C+-energy-dependent residual ion damage in GaAs: C grown by the low-energy ion-beam doping method.
In: Journal of Applied Physics, 80 (7)
doi: 10.1063/1.363306
Article, Bibliographie
Brandt, Michael ; Krozer, Viktor ; Schüßler, M. ; Bock, K.-H. ; Hartnagel, Hans L. (1996)
Characterisation of reliability of compound semiconductor devices using electrical pulses.
In: Microelectronics reliability, 36 (11/12)
doi: 10.1016/0026-2714(96)00222-3
Article, Bibliographie
Vogt, Alexander ; Hartnagel, Hans L. ; Miehe, Gerhard ; Fuess, H. ; Schmitz, J. (1996)
Electrical and microstructure analysis of ohmic contacts to p- and n-type GaSb, grown by molecular beam epitaxy.
In: Journal of Vacuum Science and Technology B, 14
doi: 10.1116/1.588790
Article, Bibliographie
Schuessler, M. ; Statzner, ; Lin, ; Krozer, ; Horn, ; Hartnagel, Hans L. (1996)
Electrochemical deposition of Pd, Ti, and Ge for applications in GaAs technology.
In: Journal of the Electrochemical Society. 143 (1996), No. 4, S. 73-75
Article, Bibliographie
Dumka, Deep C. ; Riemenschneider, Rolf ; Miao, Jianmin ; Hartnagel, Hans L. ; Singh, Babu R. (1996)
Electrochemically fabricated high-barrier Schottky contacts on n-InP and their application for metal-semiconductor-metal photodetectors.
In: Journal of The Electrochemical Society, 143 (6)
doi: 10.1149/1.1836929
Article, Bibliographie
Klingbeil, Harald ; Beilenhoff, Klaus ; Hartnagel, Hans L. (1996)
Finite-difference analysis structures consisting of roundly and rectangular shaped domains.
In: IEEE Microwave and Guided Wave Letters, 6 (8)
doi: 10.1109/75.508558
Article, Bibliographie
Dehé, Alfons ; Klingbeil, Harald ; Krozer, Viktor ; Fricke, Klaus ; Beilenhoff, Klaus ; Hartnagel, Hans L. (1996)
GaAs integrated thermoelectric microwave power sensor.
20th Workshop on Compound Semiconductor Devices and Integrated Circuits. Vilnius, Lithuania (19.05.1996-22.05.1996)
Conference or Workshop Item, Bibliographie
Dehé, Alfons ; Krozer, Viktor ; Chen, B. ; Hartnagel, Hans L. (1996)
High-sensitivity microwave power sensor for GaAs-MMIC implementation.
In: Electronic letters, 32 (23)
doi: 10.1049/el:19961416
Article, Bibliographie
Hartnagel, Hans L. (1996)
III-V compounds for high-temperature operations.
E-MRS 1996 Spring Meeting. Strasbourg, France (03.06.1996-07.06.1996)
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. (1996)
Microwave opportunities for city communications and for motor-car traffic handling.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. (1996)
Nanometric structures in future quantum electronics.
In: Review of radio science 1993-1996. Hrsg.: W.R. Stone. S. 295-303
Article, Bibliographie
Dehé, Alfons ; Hartnagel, Hans L. ; Pavlidis, Dimitris ; Hong, Kyushik ; Kuphal, E. (1996)
Properties of InGaAs/InP thermoelectric and surface bulk micromachined infrared sensors.
In: Applied physics letters. 69 (1996), S. 3039-3041, 69
doi: 10.1063/1.116832
Article, Bibliographie
Schuessler, M. ; Krozer, V. ; Bock, K. H. ; Brandt, M. ; Vecchi, L. ; Losi, R. ; Hartnagel, Hans L. (1996)
Pulsed stress reliability investigations of Schottky diodes and HBTs.
In: Microelectronics and reliability, 36 (11-12)
doi: 10.1016/0026-2714(96)00226-0
Article, Bibliographie
Tiginyanu, I. ; Miao, ; Hartnagel, Hans L. ; Rück, ; Tinschert, ; Ursaki, ; Ichizli, Victoria M. (1996)
Raman and electrical characterisation of n-InP implanted by 630-keV nitrogen.
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. (1996)
(Rez.) Ploog, K.H.: III-V quantum system research.
In: Electronics & communication: engineering journal. 8 (1996), S. 277
Article, Bibliographie
Horn, Joachim ; Pavlidis, Dimitris ; Park, Yongjo ; Hartnagel, Hans L. (1996)
Scanning tunneling microscopy characterization of MOCVD grown GaN.
In: Materials Science and Engineering: B, 44 (1/3)
doi: 10.1016/S0921-5107(96)01791-6
Article, Bibliographie
Riipulk, Jevgeni ; Hinrikus, Hiie ; Beilenhoff, Klaus ; Hartnagel, Hans L. (1996)
Simulation of breast tissues temperature measurement using Dicke radiometer by FDTD method.
In: Medical & biological engineering & computing, 34 (Suppl. 1, Part 2)
Article, Bibliographie
Riipulk, Jevgeni ; Hinrikus, Hiie ; Beilenhoff, Klaus ; Hartnagel, Hans L. (1996)
Simulation of microwave radiometric temperature measurement inside biological tissues using FDTD method.
Third International Congress of the European Bio-Electromagnetics Association (EBEA Nancy'96). Nancy, France (29.02.1996-03.03.1996)
Conference or Workshop Item, Bibliographie
Tiginyanu, I. ; Ichizli, Victoria M. ; Hartnagel, Hans L. (1996)
Surface vibrational modes in nanoporous III-V compounds.
Conference or Workshop Item, Bibliographie
Steinhagen, Frank ; Hartnagel, Hans L. ; Burkhard, H. (1996)
Up to 20GHz high-frequency small-signal AM characterisation of laser diodes.
COST 240 Workshop on Characterization Techniques for Active and Passive Photonics Components. Budapest, Hungary (25.03.1996-25.03.1996)
Conference or Workshop Item, Bibliographie
Brandt, Michael ; Schüßler, M. ; Hartnagel, Hans L. (1996)
Characterisation of the reliability of planar Schottky diodes for millimetre and submillimetre wave applications.
European Space Research and Technology Centre: ESA-ESTEC. Noordwijk, NL (14.11.1996-15.11.1996)
Conference or Workshop Item, Bibliographie
Vogt, Alexander ; Brandt, M. ; Pena, D. ; Aller, Ingo ; Hartnagel, Hans L. (1996)
Wachstum und Zuverlässigkeit von resonanten Tunneldioden.
Molecular Beam Epitaxy Workshop. Frankfurt/Oder (1996)
Conference or Workshop Item, Bibliographie
Schultheis, Rüdiger ; Hartnagel, Hans L. (1995)
3D-finite difference analysis of planar transmission lines as beam electrodes in particle storage rings.
MIOP '95, 8. Kongreßmesse für Hochfrequenztechnik. Sindelfingen (30.05.1995-01.06.1995)
Conference or Workshop Item, Bibliographie
Schuessler, M. ; Krozer, ; Pfeiffer, ; Statzner, ; Lee, ; Hartnagel, Hans L. (1995)
AlGaAs/GaAs and GaInP/GaAs HBT for high temperature microwave operation.
Conference or Workshop Item, Bibliographie
Klingbeil, Harald ; Beilenhoff, Klaus ; Hartnagel, Hans L. (1995)
Analyse und Modellierung des rechtwinkligen Koplanarleitungs-Winkels.
MIOP '95, 8. Kongreßmesse für Hochfrequenztechnik. Sindelfingen (30.05.1995-01.06.1995)
Conference or Workshop Item, Bibliographie
Riemenschneider, Rolf ; Gottwald, P. ; Hartnagel, Hans L.
ed.: Bareikis, V. (1995)
Characterisation of SiO2 deposition by low-temperature plasma and photo CVD using low-frequency noise measurements.
13th International Conference on Noise in Physical Systems and 1/f Fluctuations (ICNF'95). Palanga, Lithuania (29.05.1995-03.06.1995)
Conference or Workshop Item, Bibliographie
Chattopadhyay, S. N. ; Aller, I. ; Hartnagel, Hans L. (1995)
Detailed transport modelling of experimental behaviour of lightly plasma damaged epitaxial InP.
In: International journal of electronics, 79 (5)
doi: 10.1080/00207219508926293
Article, Bibliographie
Hartnagel, Hans L. (1995)
Engineering at German universities.
In: Engineering science and education journal. 4 (1995), Nr. 1, S. 43-47
Article, Bibliographie
Miao, Jianmin ; Hartnagel, Hans L. ; Weiss, B. L. ; Wilson, R. J. (1995)
Fabrication of free-standing membranes in n-GaAs using MeV nitrogen implantation for sensors.
Fall meeting of Materials Research Society. Boston, Mass. (27.11.1995-01.12.1995)
Conference or Workshop Item, Bibliographie
Dehé, Alfons ; Hartnagel, Hans L. (1995)
Free-standing Al/sub 0.30/Ga/sub 0.70/As thermopile infrared sensor.
53rd Annual Device Research Conference Digest. Charlottesville, VA, USA (19.06.1995-21.06.1995)
doi: 10.1109/DRC.1995.496295
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. (1995)
Heterostructure transistors for MMIC applications: HEMTs and HBTs.
Conference or Workshop Item, Bibliographie
Krozer, Viktor ; Würfl, J. ; Fricke, K. ; Schüßler, M. ; Lee, W. Y. ; Hartnagel, Hans L. (1995)
High temperature electronics with III-V compound semiconductors.
In: HITEN news, (9)
Article, Bibliographie
Krozer, Viktor ; Würfl, J. ; Fricke, K. ; Schüßler, M. ; Lee, W. Y. ; Hartnagel, Hans L. (1995)
High temperature microwave modeling and circuit design with MESFET's and HBT's.
URSI International Symposium on Signals, Systems, and Electronics (ISSSE '95). San Francisco, USA (25.10.1995-27.10.1995)
Conference or Workshop Item, Bibliographie
Hartnagel, Hans L. (1995)
III-V semiconductor properties for high temperature electronics.
In: Materials Science and Engineering: B, 29 (1-3)
doi: 10.1016/0921-5107(94)04028-3
Article, Bibliographie
Dehé, Alfons ; Fricke, K. ; Hartnagel, Hans L. (1995)
Infrared thermopile sensor based on AlGaAs/GaAs micromachining.
In: Sensors and Actuators A : Physical, 47 (1/3)
doi: 10.1016/0924-4247(94)00936-C
Article, Bibliographie
Hartnagel, Hans L. (1995)
Temperature independent HBT oscillator design.
Conference or Workshop Item, Bibliographie
Hjort, Klas ; Schweeger, Giorgio ; Dehé, Alfons ; Fricke, Klaus ; Hartnagel, Hans L. (1995)
Thickness-field excited thickness-shear resonators in (110) GaAs.
In: Applied Physics Letters, 66 (3)
doi: 10.1063/1.113533
Article, Bibliographie
Dehé, Alfons ; Fricke, K. ; Mutamba, K. ; Hartnagel, Hans L. (1995)
A piezoresistive GaAs pressure sensor with GaAs/AlGaAs membrane technology.
In: Journal of Micromechanics and Microengineering, 5
doi: 10.1088/0960-1317/5/2/021
Article, Bibliographie
Miao, Jianmin ; Hartnagel, Hans L. ; Rück, D. ; Fricke, K. (1995)
The use of ion implantation for micromachining of GaAs for sensor applications.
In: Sensors and Actuators A : Physical, 46 (1/3)
doi: 10.1016/0924-4247(94)00855-C
Article, Bibliographie
Miao, Jianmin ; Rück, D. M. ; Tinschert, K. ; Hartnagel, Hans L. (1995)
Herstellung der mikromechanischen Strukturen auf GaAs durch Ionenimplantation für Sensoranwendungen.
Industrie und Forschung: Seminar der Gesellschaft für Schwerionenforschung. Darmstadt (1995)
Conference or Workshop Item, Bibliographie
Dumka, D. C. ; Riemenschneider, Rolf ; Hartnagel, Hans L. (1995)
High-barrier Schottky contacts on N-InP using damage-free electrochemical metallization.
19th Workshop on Compound Semiconductor Devices and Integrated Circuits: WOCSDICE. Stockholm (21.05.1995-24.05.1995)
Conference or Workshop Item, Bibliographie