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Number of items: 51.

2018

Sirkeli, Vadim P. and Yilmazoglu, Oktay and Hajo, Ahid S. and Nedeoglo, Natalia D. and Nedeoglo, Dmitrii D. and Preu, Sascha and Küppers, Franko and 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, p. 1700418, 12, (2), DOI: 10.1002/pssr.201700418,
[Online-Edition: https://onlinelibrary.wiley.com/doi/abs/10.1002/pssr.2017004...],
[Article]

Al-Daffaie, Shihab and Yilmazoglu, Oktay and Jumaah, Alaa and Küppers, Franko (2018):
First Demonstration of Continuous Wave Terahertz Radiation from Semi-Insulating GaAs Photomixer with Nanowire.
In: 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Nagoya, Japan, [Conference or Workshop Item]

Jumaah, Alaa and Al-Daffaie, Shihab and Yilmazoglu, Oktay and Küppers, Franko (2018):
Graphene Enhanced 2-D Nanoelectrode For Continuous Wave Terahertz Photomixers.
In: 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Nagoya, Japan, [Conference or Workshop Item]

Al-Daffaie, Shihab and Yilmazoglu, Oktay and Jumaah, Alaa and Küppers, Franko (2018):
INVITED: Nanoelectrode Based Terahertz Devices.
In: EMN Meeting on Terahertz & Collaborative Conference on Nonlinear Optics, April 16 to 20, 2018 Amsterdam, Netherlands, [Conference or Workshop Item]

Küppers, Franko and Sirkeli, Vadim P. and Yilmazoglu, Oktay and Al-Daffaie, Shihab and Oprea, Ion and Ong, Duu Sheng and Hartnagel, Hans L (2018):
Internal Quantum Efficiency Enhancement of InGaN/GaN LEDs WITH Mg-Si pin-Doped GaN Quantum Barrier.
In: 9th International Conference on Materials Science and Condensed Matter Physics, Chisinau, Moldova, [Conference or Workshop Item]

Sirkeli, Vadim P. and Yilmazoglu, Oktay and Preu, Sascha and Küppers, Franko and 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]

2017

Sirkeli, V. P. and Yilmazoglu, Oktay and Ong, D. S. and Preu, Sascha and Küppers, F. and Hartnagel, Hans L. (2017):
Resonant Tunneling and Quantum Cascading for Optimum Room-Temperature Generation of THz Signals.
In: IEEE Transactions on Electron Devices, IEEE, pp. 3482-3488, 64, (8), ISSN 1557-9646,
DOI: 10.1109/TED.2017.2718541,
[Online-Edition: http://ieeexplore.ieee.org/abstract/document/7968341/],
[Article]

Sirkeli, Vadim P. and Yilmazoglu, Oktay and Al-Daffaie, Shihab and Preu, Sascha and Küppers, Franko and Hartnagel, Hans L. (2017):
1.33 THz room-temperature quantum cascade lasers based on ZnMgSe/ZnSe.
In: Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2017 42nd International Conference on, [Conference or Workshop Item]

Jumaah, Alaa and Al-Daffaie, Shihab and Yilmazoglu, Oktay and Küppers, Franko (2017):
Graphene—Nanowire hybrid photomixer for continuous-wave terahertz generation.
In: Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2017 42nd International Conference on, [Online-Edition: http://www.imp.tu-darmstadt.de/IRMMW-THz2017-05],
[Conference or Workshop Item]

Sirkeli, Vadim P. and Yilmazoglu, Oktay and Al-Daffaie, Shihab and Oprea, Ion and Ong, Duu Sheng and Küppers, Franko and Hartnagel, Hans L. (2017):
Resonant tunneling transport in Zn x Be 1-x Se/ZnSe/Zn y Be 1-y Se asymmetric quantum structures.
In: Nanotechnology VIII, 10248, [Conference or Workshop Item]

2016

Sirkeli, Vadim P. and Yilmazoglu, Oktay and Al-Daffaie, Shihab and Oprea, Ion and Ong, Duu Sheng and Küppers, Franko and 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, IOP Publishing, pp. 035108, 50, (3), [Article]

2015

Evtukh, Anatoliy and Hartnagel, Hans and Yilmazoglu, Oktay and Mimura, Hidenori and Pavlidis, Dimitris (2015):
Quantum Electron Sources for High Frequency Applications.
Wiley Online Library, [Online-Edition: http://dx.doi.org/10.1002/9781119037989.ch9],
[Book]

Sirkeli, Vadim P. and Yilmazoglu, Oktay and Küppers, Franko and 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, pp. 1-19, 30, (065005), ISSN 0268-1242,
[Online-Edition: http://dx.doi.org/10.1088/0268-1242/30/6/065005],
[Article]

Sirkeli, Vadim P. and Yilmazoglu, Oktay and Küppers, Franko and 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, pp. 811-818, 9, (6), [Online-Edition: http://dx.doi.org/10.1166/jno.2014.1687],
[Article]

2014

Yilmazoglu, Oktay and Evtukh, Anatoli and Al-Daffaie, Shihab and Biethan, Jens-Peter and Pavlidis, Dimitris and Litovchenko, Vladimir and Hartnagel, Hans L. (2014):
Electron field emission from nanostructured semiconductors under photo illumination.
In: Turkish Journal of Physics, The Scientific and Technological Research Council of Turkey, pp. 543-562, 38, (3), [Article]

Al-Daffaie, Shihab and Yilmazoglu, Oktay and Küppers, Franko and Hartnagel, Hans (2014):
Single nanowire photomixer for reliable and high frequency continuous wave terahertz generation.
In: Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on, [Conference or Workshop Item]

2013

Yilmazoglu, Oktay (2013):
GaN-based Gunn diodes and functional field emitters for high frequency signal generation and carbon nanotube sensors.
TU Darmstadt, [Habilitation]

Al-Daffaie, Shihab and Yilmazoglu, Oktay and Küppers, Franko and Hartnagel, Hans (2013):
Graphene LTG-GaAs photomixer for reliable continuous wave terahertz generation.
In: Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on, [Conference or Workshop Item]

2012

Kayhan, Emine and Prasad, Ravi Mohan and Gurlo, Alexander and Yilmazoglu, Oktay and Engstler, Jörg and Ionescu, Emanuel and Yoon, Songhak and Weidenkaff, Anke and Schneider, Jörg J. (2012):
Synthesis, Characterization, Electronic and Gas-Sensing Properties towards H2and CO of Transparent, Large-Area, Low-Layer Graphene.
In: Chemistry - A European Journal, Wiley, pp. 14996-15003, 18, (47), ISSN 09476539,
[Online-Edition: http://dx.doi.org/10.1002/chem.201201880],
[Article]

Yilmazoglu, Oktay and Al-Daffaie, Shihab and Hartnagel, Hans L. and Joshi, R. and Yadav, S. and Schneider, J. J. and Nick, C. and Thielemann, C. (2012):
CNT photocathodes based on GaAs high-frequency photoswitches.
In: Vacuum Nanoelectronics Conference (IVNC), 2012 25th International, [Conference or Workshop Item]

Al-Daffaie, Shihab and Yilmazoglu, Oktay and Küppers, Franko and Hartnagel, Hans (2012):
INVITED Nanogrid-based vertically integrated photomixer for continuous wave terahertz generation.
In: Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on, [Conference or Workshop Item]

2007

Litovchenko, V. and Evtukh, A. and Semenenko, M. and Grigoriev, A. and Yilmazoglu, Oktay and Hartnagel, Hans L. and Sirbu, L. and Tiginyanu, I. M. and Ursaki, V. V. (2007):
Electron field emission from narrow band gap semiconductors (InAs).
In: Semiconductor science and technology, pp. 1092-1096, 22, [Article]

Yilmazoglu, Oktay and Hartnagel, Hans L. and Pavlidis, Dimitris and Evtukh, A. and Litovchenko, V. and Semenenko, M. and Gorbanyuk, T. and Grigoriev, A. (2007):
Pecularities of electron field emission from nanostructured GaN and AlGaN.
In: Proceedings of the 3rd Ukrainian Conference on Semiconductor Physics, Odessa, Ukraina, 17-22 June 2007.- S. 120, [Conference or Workshop Item]

2006

Yilmazoglu, Oktay and Mutamba, Kabula and Pavlidis, Dimitris and Mbarga, Marie Rose (2006):
Strain sensitivity of AlGaN/GaN HEMT structures for sensing applications.
In: EICE Transactions on Electronics E, pp. 1037-1041, 89-C, [Article]

Mutamba, Kabula and Yilmazoglu, Oktay and Sydlo, Cezary and Mir, Mostafa and Hubbard, Seth and Zhao, G. and Daumiller, Ingo and Pavlidis, Dimitris (2006):
Technology aspects of GaN-based diodes for high-field operation.
In: Superlatices and Microstructures, pp. 363-368, 40, [Article]

Mutamba, K. and Yilmazoglu, Oktay and Cojocari, Oleg and Sydlo, Cezary and Pavlidis, Dimitris and Hartnagel, Hans L. (2006):
Technology of Wide-Bandgap Diode Struvtures for High Frequency Operation.
Piscataway, NJ, IEEE Operations Center, In: International Semiconductor Conference, 2006 : 29th edition ; September 27 - 29, 2006, Sinaia, Romania ; CAS 2006 / organized by National Institute for Research and Development in Microtechnologies (IMT-Bucharest). - Piscataway, NJ : IEEE Operations Cente, [Conference or Workshop Item]

2005

Yilmazoglu, Oktay (2005):
III-V-Halbleiter Feldemissions-Sensoren und -Mikrowellenquellen und Positionssensorik.
Aachen, Shaker, TU Darmstadt, ISBN 3-8322-3832-8,
[Ph.D. Thesis]

2004

Evtukh, A. A. and Hartnagel, Hans L. and Litovchenko, V. G. and Semenenko, M. O. and Yilmazoglu, Oktay (2004):
Enhancement of electron field emission stability by nitrogen-doped diamond-like carbon film coating.
In: Semiconductor science & technology, pp. 923-929, 19, [Article]

Litovchenko, V. G. and Evtukh, A. A. and Kryuchenko, Yu. and Goncharuk, N. M. and Yilmazoglu, Oktay and Mutamba, Kabula and Hartnagel, Hans L. and Pavlidis, Dimitris (2004):
Quantum size resonance tunneling in the field emission phenomenon.
In: Journal of applied physics, pp. 867-877, 96, [Article]

2003

Evtukh, A. A. and Litovchenko, V. G. and Litvin, Yu. M. and Hartnagel, Hans L. and Yilmazoglu, Oktay (2003):
Field emission from SiOx films deposited on Si and GaAs tip arrays.
In: IVMC, International Vacuum Microelectronics Conference <16, 2003, Toyonaka>: Technical digest ...- Osaka, 2003.- 314 S.- ISBN 4-8181-9515-4, [Conference or Workshop Item]

Yilmazoglu, Oktay and Pavlidis, Dimitris and Litvin, Yu. M. and Hubbard, S. M. and Tiginyanu, I. M. and Mutamba, Kabula and Hartnagel, Hans L. and Litovchenko, V. G. and Evtukh, A. A. (2003):
Field emission from quantum size GaN structures.
In: Applied surface science, pp. 46-50, Vol. 2, [Article]

Litovchenko, V. G. and Evtukh, A. A. and Litvin, Yu. M. and Goncharuk, N. M. and Hartnagel, Hans L. and Yilmazoglu, Oktay and Pavlidis, Dimitris (2003):
Pecularities of the electron field emission from quantum-size structures.
In: Applied surface science, pp. 160-168, Vol. 2, [Article]

2002

Litovchenko, V. G. and Evtukh, A. A. and Goncharuk, N. M. and Litvin, Yu. M. and Hartnagel, Hans L. and Yilmazoglu, Oktay (2002):
Anomalous field emission from quantum size structure.
In: International Vacuum Microelectronics Conference <15, 2002, Lyon>: Proceedings ... IVMC 2002.- Lyon, 2002.- PM.49, [Conference or Workshop Item]

Yilmazoglu, Oktay and Pavlidis, Dimitris and Litvin, Yu. M. and Hubbard, S. M. and Tiginyanu, I. and Mutamba, Kabula and Hartnagel, Hans L. and Litovchenko, V. G. and Evtukh, A. A. (2002):
Field emission from quantum size GaN whiskers.
In: International Vacuum Microelectronics Conference <15, 2002, Lyon>: Proceedings ... IVMC 2002.- Lyon, 2002.- QB3.07, [Conference or Workshop Item]

Megej, Alexander and Beilenhoff, Klaus and Schüßler, Martin and Ziroff, A. and Mottet, Bastian and Yilmazoglu, Oktay and Mutamba, Kabula and Hamann, C. D. and Baican, R. and Hartnagel, Hans L. (2002):
Integrated microwave sensor for cavity-length measurement in machine engineering.
In: IEEE transactions on microwave theory and techniques, Institute of Electrical and Electronics Engineers (IEEE), pp. 3070-3076, 5, (12), ISSN 1557-9670,
[Article]

Megej, Alexander and Beilenhoff, Klaus and Schüßler, Martin and Ziroff, A. and Mottet, Bastian and Yilmazoglu, Oktay and Mutamba, Kabula and Hamann, C. D. and Baican, R. and Hartnagel, Hans L. (2002):
Integrated microwave sensor for cavity-length measurement with sub-millimeter accuracy.
Piscataway, NJ, IEEE Service Center, In: IEEE MTT S International Microwave Symposium digest 2002 ; vol. 2 / ed. Rob Hamilton.- Piscataway, NJ: IEEE Service Center, 2002.- ISBN 0-7803-7239-5.- S. 643-646, [Conference or Workshop Item]

Hartnagel, Hans L. and Mutamba, Kabula and Brandt, Michael and Yilmazoglu, Oktay (2002):
Verbindungshalbleitersensorik für mechatronische Systeme.
In: Mechatronische Systeme für den Maschinenbau : Ergebnisse aus dem Sonderforschungsbereich ... / Hrsg.: Rolf Isermann.- Weinheim: Wiley-VCH-Verl., 2002.- ISBN 3-527-27730-7.- S. 287-316, Weinheim, Wiley-VCH-Verl., [Book Section]

Litvin, Yu. M. and Evtukh, A. A. and Yilmazoglu, Oktay and Hartnagel, Hans L. (2002):
The influence of the self-organization nano-size structures on the electron field emission.
In: Abstracts, ... general conference of the European Physical Society, Vol. 2, [Conference or Workshop Item]

2001

Yilmazoglu, Oktay and Mimura, H. and Mutamba, K. and Hartnagel, H. L. and Shimawaki, H. and Yokoo, K. (2001):
Emission behaviour of micromachined vertical field emitter with cantilever structure.
In: European Field Emission Workshop <3, 2001, Alicante>: Proceedings, [Conference or Workshop Item]

Mimura, H. and Yilmazoglu, Oktay and Shimawaki, H. and Yokoo, K. and Mutamba, K. and Hartnagel, Hans L. (2001):
Emission characteristics of a gallium arsenide wedge emitter monolithically fabricated with an air-bridge and a cantilever anode.
Piscataway, NJ, IEEE, In: IVMC 2001: International Vacuum Microelectronics Conference <14, 2001, Davis, CA>: Technical digest. - Piscataway, NJ: IEEE, 2001, [Conference or Workshop Item]

Yokoo, K. and Okamura, K. and Hasegawa, H. and Mimura, H. and Yilmazoglu, Oktay and Mutamba, Kabula and Hartnagel, Hans L. and Ishizuka, H. and Kawamura, Y. (2001):
Experiments of microwave and optical wave radiation using field emission micro cathode.
In: ISMOT 2001: International Symposium on Microwave and Optical Technology <9, 2001, Montreal>; Technical digest, [Conference or Workshop Item]

Yilmazoglu, Oktay and Mimura, H. and Mutamba, K. and Hartnagel, H. L. and Okamura, K. and Shimawaki, H. and Yokoo, K. (2001):
Generation of a bunched beam by field-emitter structures.
Berlin, VDE-Verl., In: Displays and Vacuum Electronics <2001, Garmisch-Partenkirchen>: Proceedings. S. 263-267. - Berlin: VDE-Verl., 2001, [Conference or Workshop Item]

Yilmazoglu, Oktay and Mimura, H. and Mutamba, K. and Cojocari, O. and Hartnagel, H. L. and Okamura, K. and Shimawaki, H. and Yokoo, K. (2001):
Generation of modulation beam with GaAs field-emitter structures.
In: IVEC 2001: International Vacuum Electronics Conference <2, 2001, Noordwijk>: Proceedings, [Conference or Workshop Item]

Yilmazoglu, Oktay and Brandt, M. and Sigmund, J. and Genc, E. and Hartnagel, H. L. (2001):
Integrated InAs/GaSb 3D magnetic field sensors for "the intelligent tire".
In: Sensors and actuators, pp. 59-63, A 94, [Article]

2000

Hartnagel, Hans L. and Yilmazoglu, Oktay and Mutamba, Kabula (2000):
Concepts of microwave power electronics based on electron field emission from structures fabricated in semiconducting materials.
In: Next Generation mm-Wave Solid State Power: Materials, Devices and Systems: Office of Naval Research Workshop <2000, S. Padre Island, Texas>; Technical digest, [Conference or Workshop Item]

Yokoo, K. and Okamura, K. and Mimura, H. and Yilmazoglu, Oktay and Arslan, D. and Hartnagel, Hans L. and Ishizuka, H. (2000):
Field emission studies for microwave and optical wave generation.
Berlin (u.a.), VDE-Verl., In: THz Conference 2000: 8th International Conference on Terahertz Electronics, 2000 Darmstadt Techn. Univ., Inst. für Hochfrequenztechnik; Technical digest. - Berlin (u.a.): VDE-Verl., 2000, [Conference or Workshop Item]

Mimura, H. and Okamura, K. and Shimawaki, H. and Yokoo, K. and Yilmazoglu, Oktay and Hartnagel, Hans L. (2000):
GaAs lateral field emitters for generation of modulation beam using gunn effect.
In: IVMC 2000: International Vacuum Microelectronics Conference <13, 2000, Guanghou, China>; Technical digest, [Conference or Workshop Item]

Yilmazoglu, Oktay and Hartnagel, H. L. and Mimura, H. and Okumura, K. and Shimawaki, H. and Yokoo, K. (2000):
Gunn effect based modulationbeam generation with GaAs lateral field emitter structures.
In: European Field Emission Workshop <2, 2000, Segovia>: Proceedings, [Conference or Workshop Item]

Hartnagel, Hans L. and Mutamba, Kabula and Yilmazoglu, Oktay (2000):
New aspects of quantum electronics based MEMS.
In: Cross-Straight Symposium on Microsystems Technologies <1, 2000, Tainan, Taiwan>: Proceedings, [Conference or Workshop Item]

Hartnagel, Hans L. and Mutamba, Kabula and Brandt, M. and Yilmazoglu, Oktay (2000):
Verbindungshalbleitersensoren für mechatronische Systeme.
In: Thema Forschung, pp. S. 72-81, 6, [Article]

1999

Hartnagel, Hans L. and Brandt, M. and Mayer, K. and Mutamba, Kabula and Yilmazoglu, Oktay and Megej, Alexander and Lin, C. I. and Rodriguez, M. (1999):
Contact free sensor signal transfer by microwave and RF links.
In: COMITE'99: International Conference on Microwave Techniques <1999, Paradubice>; Proceedings, [Conference or Workshop Item]

This list was generated on Sat Jul 20 01:35:20 2019 CEST.