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Sirkeli, Vadim P ; Yilmazoglu, Oktay ; Al-Daffaie, Shihab ; Preu, Sascha ; Küppers, Franko ; Hartnagel, Hans L :
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.
[Konferenz- oder Workshop-Beitrag], (2017)

Jumaah, Alaa ; Al-Daffaie, Shihab ; Yilmazoglu, Oktay ; Küppers, Franko :
Graphene—Nanowire hybrid photomixer for continuous-wave terahertz generation.
In: Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2017 42nd International Conference on.
[Konferenz- oder Workshop-Beitrag], (2017)

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

Sirkeli, Vadim P ; Yilmazoglu, Oktay ; Al-Daffaie, Shihab ; Oprea, Ion ; Ong, Duu Sheng ; Küppers, Franko ; Hartnagel, Hans L :
Efficiency enhancement of InGaN/GaN light-emitting diodes with pin-doped GaN quantum barrier.
In: Journal of Physics D: Applied Physics, 50 (3) 035108.
[Artikel], (2016)

Evtukh, Anatoliy ; Hartnagel, Hans ; Yilmazoglu, Oktay ; Mimura, Hidenori ; Pavlidis, Dimitris:
Quantum Electron Sources for High Frequency Applications.
[Online-Edition: http://dx.doi.org/10.1002/9781119037989.ch9]
Wiley Online Library , pp. 375-446.
[Buch], (2015)

Sirkeli, Vadim P. ; Yilmazoglu, Oktay ; Küppers, Franko ; Hartnagel, Hans L. :
Effect of p-NiO and n-ZnSe interlayers on the efficiency of p-GaN/n-ZnO light-emitting diode structures.
[Online-Edition: http://dx.doi.org/10.1088/0268-1242/30/6/065005]
In: Semiconductor Science and Technology, 30 (065005) pp. 1-19. ISSN 0268-1242
[Artikel], (2015)

Sirkeli, Vadim P. ; Yilmazoglu, Oktay ; Küppers, Franko ; Hartnagel, Hans L. :
Effect of p-NiO Interlayer on Internal Quantum Efficiency of p-GaN/n-ZnO Light-Emitting Devices.
[Online-Edition: http://dx.doi.org/10.1166/jno.2014.1687]
In: Journal of Nanoelectronics and Optoelectronics, 9 (6) pp. 811-818.
[Artikel], (2015)

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

Al-Daffaie, Shihab ; Yilmazoglu, Oktay ; Küppers, Franko ; Hartnagel, Hans :
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.
[Konferenz- oder Workshop-Beitrag], (2014)

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

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

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

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

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

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

Yilmazoglu, Oktay ; Hartnagel, Hans L. ; Pavlidis, Dimitris ; Evtukh, A. ; Litovchenko, V. ; Semenenko, M. ; Gorbanyuk, T. ; Grigoriev, A. :
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 .
[Konferenz- oder Workshop-Beitrag], (2007)

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

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

Mutamba, K. ; Yilmazoglu, Oktay ; Cojocari, Oleg ; Sydlo, Cezary ; Pavlidis, Dimitris ; Hartnagel, Hans L. :
Technology of Wide-Bandgap Diode Struvtures for High Frequency Operation.
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 . IEEE Operations Center , Piscataway, NJ
[Konferenz- oder Workshop-Beitrag], (2006)

Yilmazoglu, Oktay :
III-V-Halbleiter Feldemissions-Sensoren und -Mikrowellenquellen und Positionssensorik.
Shaker , Aachen
[Dissertation]

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

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

Evtukh, A. A. ; Litovchenko, V. G. ; Litvin, Yu. M. ; Hartnagel, Hans L. ; Yilmazoglu, Oktay :
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 .
[Konferenz- oder Workshop-Beitrag], (2003)

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

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

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

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

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

Megej, Alexander ; Beilenhoff, Klaus ; Schüßler, Martin ; Ziroff, A. ; Mottet, Bastian ; Yilmazoglu, Oktay ; Mutamba, Kabula ; Hamann, C. D. ; Baican, R. ; Hartnagel, Hans L. :
Integrated microwave sensor for cavity-length measurement with sub-millimeter accuracy.
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 . IEEE Service Center , Piscataway, NJ
[Konferenz- oder Workshop-Beitrag], (2002)

Hartnagel, Hans L. ; Mutamba, Kabula ; Brandt, Michael ; Yilmazoglu, Oktay :
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. Wiley-VCH-Verl., Weinheim
[Buchkapitel], (2002)

Litvin, Yu. M. ; Evtukh, A. A. ; Yilmazoglu, Oktay ; Hartnagel, Hans L. :
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 .
[Konferenz- oder Workshop-Beitrag], (2002)

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

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

Yokoo, K. ; Okamura, K. ; Hasegawa, H. ; Mimura, H. ; Yilmazoglu, Oktay ; Mutamba, Kabula ; Hartnagel, Hans L. ; Ishizuka, H. ; Kawamura, Y. :
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 .
[Konferenz- oder Workshop-Beitrag], (2001)

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

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

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

Hartnagel, Hans L. ; Yilmazoglu, Oktay ; Mutamba, Kabula :
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 .
[Konferenz- oder Workshop-Beitrag], (2000)

Yokoo, K. ; Okamura, K. ; Mimura, H. ; Yilmazoglu, Oktay ; Arslan, D. ; Hartnagel, Hans L. ; Ishizuka, H. :
Field emission studies for microwave and optical wave generation.
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 . VDE-Verl. , Berlin (u.a.)
[Konferenz- oder Workshop-Beitrag], (2000)

Mimura, H. ; Okamura, K. ; Shimawaki, H. ; Yokoo, K. ; Yilmazoglu, Oktay ; Hartnagel, Hans L. :
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 .
[Konferenz- oder Workshop-Beitrag], (2000)

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

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

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

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

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