Prof. Wojciech Knap Profile

Prof. Wojciech Knap

Senior Researcher at Univ Montpellier

SPIE Involvement:

Author

Publications (37)

Proceedings Article | 3 October 2022 Presentation

Presentation

Towards terahertz optopair based on AlGaN/GaN HEMTs

Maciej Sakowicz, Maksym Dub, Pavlo Sai, Dmitro But, Grzegorz Cywinski, Justinas Jorudas, Artur Šimukovic, Pawel Prystawko, Simonas Indrišiunas, Vitalij Kovalevskij, Sergey Rumyantsev, Irmantas Kašalynas, Wojciech Knap

Proceedings Volume 12230, 1223003 (2022) https://doi.org/10.1117/12.2632980

KEYWORDS: Field effect transistors, Plasma, Terahertz radiation, Transistors, Gallium nitride, Fin field effect transistors, Silicon carbide, Temperature metrology, Resonators, Plasma generation

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Proceedings Article | 5 March 2021 Presentation + Paper

Presentation + Paper

AlGaN/GaN heterostructures for plasma wave detection and emission in THz regime

M. Sakowicz, P. Sai, D. But, G. Cywinski, M. Dub, I. Kašalynas, P. Prystawko, S. Rumyantsev, W. Knap

Proceedings Volume 11685, 116850C (2021) https://doi.org/10.1117/12.2576870

KEYWORDS: Plasma, Field effect transistors, Terahertz radiation, Heterojunctions, Fin field effect transistors, Transistors, Terahertz detection, Gallium nitride, Temperature metrology

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Proceedings Article | 20 August 2020 Poster + Paper

Poster + Paper

Current-driven optical response of plasmonic crystal: From dissipation to amplification

Ilya Gorbenko, Valentin Kachorovskii, Wojciech Knap

Proceedings Volume 11462, 1146223 (2020) https://doi.org/10.1117/12.2567626

KEYWORDS: Plasmonics, Terahertz radiation, Crystals, Plasma, Plasmons, Field effect transistors, Sensors, Physics, Modulation

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Proceedings Article | 30 March 2020 Paper

Paper

Terahertz gain and amplification in current-driven metasurfaces of graphene Dirac plasmons

S. Boubanga-Tombet, D. Yadav, A. Satou, W. Knap, V. Popov, T. Otsuji

Proceedings Volume 11348, 113480P (2020) https://doi.org/10.1117/12.2559504

KEYWORDS: Graphene, Plasmons, Terahertz radiation, Plasmonics, Plasma, Transistors, Absorption, Field effect transistors, Optical pumping, Terahertz technology

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Proceedings Article | 2 March 2020 Paper

Paper

Sub-terahertz detection by fin-shaped GaN/AlGaN transistors

P. Sai, D. But, G. Cywinski, M. Dub, M. Sakowicz, P. Prystawko, S. Rumyantsev, W. Knap

Proceedings Volume 11279, 1127905 (2020) https://doi.org/10.1117/12.2547298

KEYWORDS: Field effect transistors, Plasma, Terahertz radiation, Sensors, Gallium nitride, Terahertz detection

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Proceedings Article | 13 May 2019 Paper

Paper

Terahertz light amplification of stimulated emission of radiation in current-injection graphene channel transistor

S. Boubanga-Tombet, D. Yadav, T. Watanabe, A. Satou, W. Knap, V. Popov, V. Ryzhii, T. Otsuji

Proceedings Volume 10982, 109822V (2019) https://doi.org/10.1117/12.2520092

KEYWORDS: Terahertz radiation, Graphene, Plasmons, Plasmonics, Transistors, Optical amplifiers, Absorption, Modulation, Field effect transistors, Physics

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Proceedings Article | 23 August 2017 Paper

Paper

Temperature-driven massless fermions in HgCdTe heterostructures

F. Teppe, S. Ruffenach, S. Krishtopenko, M. Marcinkiewicz, C. Consejo, J. Torres, M. Orlita, W. Knap, D. Smirnov, S. Morozov, V. Gavrilenko, N. Mikhailov, S. Dvoretskii

Proceedings Volume 10383, 103830C (2017) https://doi.org/10.1117/12.2275037

KEYWORDS: Heterojunctions, Particles, Quantum wells, Cadmium, Magnetism, Quantum electrodynamics, Electrons

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Proceedings Article | 13 May 2016 Paper

Paper

Performance evaluation of active sub-Terahertz systems in Degraded Visual Environments (DVE)

Romain Ceolato, Bernard Tanguy, Christian Martin, Thierry Huet, Patrick Chervet, Gerard Durand, Nicolas Riviere, Laurent Hespel, Nina Diakonova, Dmitry But, Wojciech Knap, Jerome Meilhan, Baptiste Delplanque, Jonathan Oden, François Simoens

Proceedings Volume 9839, 983906 (2016) https://doi.org/10.1117/12.2223939

KEYWORDS: Driver's vision enhancers, Terahertz radiation, Absorption, Imaging systems, Cameras, Signal attenuation, Visualization, Bolometers, Atmospheric particles, Sensors

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Proceedings Article | 14 March 2015 Paper

Paper

Room-temperature zero-bias plasmonic THz detection by asymmetric dual-grating-gate HEMT

T. Watanabe, T. Kawasaki, A. Satou, S. Boubanga Tombet, T. Suemitsu, G. Ducournau, D. Coquillat, W. Knap, H. Minamide, H. Ito, Vyacheslav Popov, Yahya Meziani, T. Otsuji

Proceedings Volume 9362, 93620F (2015) https://doi.org/10.1117/12.2079184

KEYWORDS: Plasmons, Terahertz radiation, Plasmonics, Field effect transistors, Terahertz detection, Sensors, Phase velocity, Quantum efficiency, Antennas, Diffraction

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SPIE Journal Paper | 5 March 2015

Terahertz magneto-spectroscopy of a point contact based on CdTe/CdMgTe quantum well

Ignas Grigelionis, Marcin Białek, Marian Grynberg, Magdalena Czapkiewicz, Valery Kolkovskiy, Maciej Wiater, Tomasz Wojciechowski, Jerzy Wróbel, Tomasz Wojtowicz, Nina Diakonova, Wojciech Knap, Jerzy Łusakowski

JNP, Vol. 9, Issue 01, 093082, (March 2015) https://doi.org/10.1117/12.10.1117/1.JNP.9.093082

KEYWORDS: Terahertz radiation, Quantum wells, Chromium, Magnetism, Phonons, Plasmons, Polarons, Semiconducting wafers, Sensors, Plasma

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Proceedings Article | 5 September 2014 Paper

Paper

Terahertz magnetospectroscopy of a point contact based on CdTe/CdMgTe quantum well

I. Grigelionis, M. Bialek, M. Grynberg, M. Czapkiewicz, V. Kolkovski, M. Wiater, M. Wojciechowski, J. Wróbel, T. Wojtowicz, N. Diakonova, W. Knap, J. Łusakowski

Proceedings Volume 9199, 91990G (2014) https://doi.org/10.1117/12.2061938

KEYWORDS: Terahertz radiation, Magnetism, Electroluminescent displays, Chromium, Quantum wells, Semiconducting wafers, Polarons, Plasmons, Phonons, Sensors

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Proceedings Article | 7 March 2014 Paper

Paper

High-performance room-temperature THz nanodetectors with a narrowband antenna

Leonardo Viti, Dominique Coquillat, Daniele Ercolani, Wojciech Knap, Lucia Sorba, Miriam Vitiello

Proceedings Volume 8985, 89850W (2014) https://doi.org/10.1117/12.2040529

KEYWORDS: Antennas, Terahertz radiation, Sensors, Field effect transistors, Indium arsenide, Teeth, Electrodes, Transistors, Electromagnetism, Nanowires

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SPIE Journal Paper | 27 November 2013 Open Access

Open Access

Emission and detection of terahertz radiation using two-dimensional plasmons in semiconductor nanoheterostructures for nondestructive evaluations

Taiichi Otsuji, Takayuki Watanabe, Stephane Albon Boubanga Tombet, Akira Satou, Victor Ryzhii, Vyacheslav Popov, Wojciech Knap

OE, Vol. 53, Issue 03, 031206, (November 2013) https://doi.org/10.1117/12.10.1117/1.OE.53.3.031206

KEYWORDS: Terahertz radiation, Plasmons, Field effect transistors, Electrons, Plasma, Sensors, Millimeter wave sensors, Nondestructive evaluation, Received signal strength, Plasmonics

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Proceedings Article | 26 September 2013 Paper

Paper

Magnetospectroscopy of HgTe based topological insulators

F. Teppe, M. Zholudev, M. Orlita, C. Consejo, N. Diakonova, D. But, D. Coquillat, W. Knap, N. Mikhailov, S. Dvoretskii, V. Aleshkin, V. Gavrilenko

Proceedings Volume 8813, 88130L (2013) https://doi.org/10.1117/12.2022854

KEYWORDS: Quantum wells, Magnetism, Fermions, Terahertz radiation, Dielectrics, Cadmium, Absorption, Systems modeling, Heterojunctions, Oscillators

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Proceedings Article | 24 September 2013 Paper

Paper

The dynamic range of THz broadband FET detectors

D. But, N. Diakonova, C. Drexler, O. Drachenko, K. Romanov, O. Golenkov, F. Sizov, A. Gutin, M. Shur, S. Ganichev, W. Knap

Proceedings Volume 8846, 884612 (2013) https://doi.org/10.1117/12.2024226

KEYWORDS: Field effect transistors, Terahertz radiation, Sensors, Free electron lasers, Transistors, Antennas, Indium gallium arsenide, Electron transport, Signal detection, Pulsed laser operation

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Proceedings Article | 24 September 2013 Paper

Paper

Field effect transistor as detector of THz radiation helicity

K. Romanov, N. Dyakonova, D. But, F. Teppe, W. Knap, M. Dyakonov, C. Drexler, P. Olbrich, J. Karch, M. Schafberger, S. Ganichev, Yu. Mityagin, O. Klimenko

Proceedings Volume 8846, 88460N (2013) https://doi.org/10.1117/12.2022264

KEYWORDS: Antennas, Field effect transistors, Terahertz radiation, Transistors, Sensors, Phase shifts, Millimeter wave sensors, Polarization, Resistance, Applied physics

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Proceedings Article | 24 September 2013 Paper

Paper

Nanotransistor based THz plasma detectors: low tempeatures, graphene, linearity, and circular polarization studies

W. Knap, D. But, N. Diakonova, D. Coquillat, M. Vitiello, S. Blin, A. El Fatimy, F. Teppe, A. Tredicucci, T. Nagatsuma, S. Ganichev

Proceedings Volume 8846, 88460M (2013) https://doi.org/10.1117/12.2024206

KEYWORDS: Field effect transistors, Terahertz radiation, Transistors, Sensors, Plasma, Graphene, Modulation, Resistance, Polarization, Terahertz detection

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Proceedings Article | 29 May 2013 Paper

Paper

Emission and detection of terahertz radiation using two dimensional plasmons in semiconductor nano-heterostructures for nondestructive evaluations

Taiichi Otsuji, Takayuki Watanabe, Stephane Albon Boubanga Tombet, Akira Satou, Victor Ryzhii, Vyacheslav Popov, Wojciech Knap

Proceedings Volume 8725, 87250F (2013) https://doi.org/10.1117/12.2015089

KEYWORDS: Terahertz radiation, Plasmons, Electrons, Field effect transistors, Plasma, Sensors, Millimeter wave sensors, Nondestructive evaluation, Received signal strength, Semiconductors

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Proceedings Article | 27 March 2013 Paper

Paper

Room temperature generation of THz radiation in GaN quantum wells structures

A. Penot, J. Torres, P. Nouvel, L. Varani, F. Teppe, C. Consejo, N. Dyakonova, W. Knap, Y. Cordier, S. Chenot, M. Chmielowska, J.-P. Faurie, B. Beaumont, P. Shiktorov, E. Starikov, V. Gruzinskis

Proceedings Volume 8624, 862409 (2013) https://doi.org/10.1117/12.2002504

KEYWORDS: Terahertz radiation, Gallium nitride, Quantum wells, Plasma, Dielectrics, Antennas, Temperature metrology, Spectroscopy, Heterojunctions, Mirrors

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Proceedings Article | 27 March 2013 Paper

Paper

Antenna-coupled heterostructure field effect transistors for integrated terahertz heterodyne mixers

Alessandra Di Gaspare, Valeria Giliberti, Roberto Casini, Ennio Giovine, Florestanto Evangelisti, Dominique Coquillat, Wojciech Knap, Sergey Sadofev, Raffaella Calarco, Massimiliano Dispenza, Claudio Lanzieri, Michele Ortolani

Proceedings Volume 8624, 862416 (2013) https://doi.org/10.1117/12.2004087

KEYWORDS: Antennas, Terahertz radiation, Transistors, Field effect transistors, Heterojunctions, Gallium nitride, Signal detection, Seaborgium, Heterodyning, Polarization

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Proceedings Article | 4 February 2013 Paper

Paper

Room-temperature nanowire terahertz photodetectors

Lorenzo Romeo, Dominique Coquillant, Leonardo Viti, Daniele Ercolani, Lucia Sorba, Wojciech Knap , Alessandro Tredicucci, Miriam Vitiello

Proceedings Volume 8631, 86312E (2013) https://doi.org/10.1117/12.2004193

KEYWORDS: Terahertz radiation, Sensors, Quantum cascade lasers, Field effect transistors, Antennas, Modulation, Transistors, Electrodes, Semiconductors, Nanowires

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Proceedings Article | 15 October 2012 Paper

Paper

Terahertz detection and emission by field-effect transistors

Wojciech Knap, Nina Dyakonova, Franz Schuster, Dominique Coquillat, Frédéric Teppe, Benoît Giffard, Dmytro But, Oleksander Golenkov, Fedor Sizov, Takayuki Watanabe, Youichi Tanimoto, Taiichi Otsuji

Proceedings Volume 8496, 84960I (2012) https://doi.org/10.1117/12.930091

KEYWORDS: Terahertz radiation, Sensors, Field effect transistors, Silicon, Transistors, Antennas, Signal detection, Terahertz detection, Plasma, Amplifiers

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Proceedings Article | 15 October 2012 Paper

Paper

Semiconductor nanowire field-effect transistors: towards high-frequency THz detectors

A. Pitanti, M. Vitiello, L. Romeo, D. Coquillat, F. Teppe, W. Knap, D. Ercolani, L. Sorba, A. Tredicucci

Proceedings Volume 8496, 84960N (2012) https://doi.org/10.1117/12.932251

KEYWORDS: Terahertz radiation, Field effect transistors, Transistors, Sensors, Indium arsenide, Semiconductors, Antennas, Electrodes, Silicon, Nanowires

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Proceedings Article | 9 May 2012 Paper

Paper

Ultrahigh sensitive plasmonic terahertz detectors based on an asymmetric dual-grating gate HEMT structure

Taiichi Otsuji, Stephane Boubanga-Tombet, Takayuki Watanabe, Yudai Tanimoto, Akira Satou, Tetsuya Suemitsu, Yuye Wang, Hiroaki Minamide, Hiromasa Ito, Yahya Moubarak Meziani, Dominique Coquillat, Wojciech Knap, Denis Fateev, Viacheslav Popov

Proceedings Volume 8363, 83630P (2012) https://doi.org/10.1117/12.919978

KEYWORDS: Terahertz radiation, Field effect transistors, Sensors, Plasmons, Plasmonics, Photovoltaics, Plasma, Millimeter wave sensors, Transistors, Modulation

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Proceedings Article | 1 March 2012 Paper

Paper

THz transmission modulated by a dc-bias through GaN quantum well structure

A. Penot, J. Torres, T. Laurent, R. Sharma, P. Nouvel, S. Blin, L. Varani, W. Knap, Y. Codier, M. Chmielowska, S. Chenot, J.-P. Faurie, B. Beaumont, P. Shiktorov, E. Starikov, V. Gruzinskis, V. Korotyeyev, V. Kochelap

Proceedings Volume 8261, 826111 (2012) https://doi.org/10.1117/12.905958

KEYWORDS: Terahertz radiation, Electrons, Gallium nitride, Temperature metrology, Quantum wells, Sapphire, Resistance, Nitrogen, Modulation, Physics

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Proceedings Article | 28 February 2012 Paper

Paper

Second harmonic generation in GaN-based photonic crystals for single molecule investigations

Dominique Coquillat, Jérémie Torres, Marine Le Vassor d'Yerville, David Cassagne, Frédéric Teppe, Nina Dyakonova, Wojciech Knap, Richard De La Rue, Sophie Bouchoule, Emmanuel Margeat, Catherine Royer

Proceedings Volume 8262, 82621R (2012) https://doi.org/10.1117/12.905593

KEYWORDS: Gallium nitride, Second-harmonic generation, Molecules, Harmonic generation, Photonic crystals, Luminescence, Molecular photonics, Dispersion, Nonlinear optics, Waveguides

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Proceedings Article | 28 February 2012 Paper

Paper

AlGaN/GaN based field effect transistors for terahertz detection and imaging

M. Sakowicz, M. Lifshits, O. Klimenko, D. Coquillat, N. Dyakonova, F. Teppe, C. Gaquière, M. Poisson, S. Delage, W. Knap

Proceedings Volume 8262, 82621V (2012) https://doi.org/10.1117/12.908236

KEYWORDS: Field effect transistors, Terahertz radiation, Transistors, Signal detection, Sensors, Terahertz detection, Ceramics, Resistance, Capacitance, Millimeter wave sensors

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Proceedings Article | 21 January 2012 Paper

Paper

Room temperature terahertz detectors based on semiconductor nanowire field effect transistors

Miriam Vitiello, Dominique Coquillat, Leonardo Viti, Daniele Ercolani, Frederic Teppe, Alessandro Pitanti, Fabio Beltram, Lucia Sorba, Wojciech Knap, Alessandro Tredicucci

Proceedings Volume 8268, 826829 (2012) https://doi.org/10.1117/12.909408

KEYWORDS: Field effect transistors, Indium arsenide, Antennas, Silicon, Sensors, Semiconductors, Terahertz radiation, Capacitance, Scanning electron microscopy, Nanowires

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Proceedings Article | 26 May 2011 Paper

Paper

Terahertz detection by field effect transistors security imaging

W. Knap, F. Teppe, C. Consejo, B. Chenaud, J. Torres, P. Solignac, Z. Wasilewski, M. Zholudev, N. Dyakonova, D. Coquillat, P. Buzatu, A. El Fatimy, F. Schuster, H. Videlier, M. Sakowicz, B. Giffard, T. Skotnicki, F. Palma

Proceedings Volume 8023, 802307 (2011) https://doi.org/10.1117/12.883661

KEYWORDS: Terahertz radiation, Field effect transistors, Sensors, Plasma, Quantum cascade lasers, Transistors, Terahertz detection, Antennas, Physics, Silicon

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Proceedings Article | 26 May 2011 Paper

Paper

Terahertz imaging with InP high-electron-mobility transistors

Takayuki Watanabe, Keisuke Akagawa, Yudai Tanimoto, Dominique Coquillat, Wojciech Knap, Taiichi Otsuji

Proceedings Volume 8023, 80230P (2011) https://doi.org/10.1117/12.887952

KEYWORDS: Terahertz radiation, Field effect transistors, Sensors, Transistors, Plasma, Millimeter wave imaging, Terahertz detection, Adhesives, Plasmons, Radiation effects

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Proceedings Article | 20 October 2010 Paper

Paper

THz imaging with low-cost 130 nm CMOS transistors

Franz Schuster, Maciej Sakowicz, Alexandre Siligaris, Laurent Dussopt, Hadley Videlier, Dominique Coquillat, Frédéric Teppe, Benoît Giffard, Adrien Dobroiu, Thomas Skotnicki, Wojciech Knap

Proceedings Volume 7837, 783704 (2010) https://doi.org/10.1117/12.864877

KEYWORDS: Terahertz radiation, Sensors, Field effect transistors, Antennas, Transistors, CMOS sensors, Raster graphics, Staring arrays, CMOS technology, Silicon

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Proceedings Article | 27 April 2010 Paper

Paper

Plasmon-resonant microchip emitters and detectors for terahertz sensing and spectroscopic applications

Taiichi Otsuji, Tsuneyoshi Komori, Takayuki Watanabe, Tetsuya Suemitsu, Dominique Coquillat, Wojciech Knap

Proceedings Volume 7671, 767102 (2010) https://doi.org/10.1117/12.850009

KEYWORDS: Terahertz radiation, Plasmons, Electrons, Sensors, Spectroscopy, Lamps, Signal detection, Semiconductors, Plasmonics, FT-IR spectroscopy

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SPIE Journal Paper | 1 October 2009

Efficiency enhancement of emission of terahertz radiation by optical excitation from dual grating gate HEMT

Yahya Meziani, Takuya Nishimura, H. Handa, H. Tsuda, T. Suemitsu, Wojtek Knap, Taiichi Otsuji, Eiichi Sano, Grennady Tsymbalov, Vyacheslav Popov

JNP, Vol. 3, Issue 01, 031980, (October 2009) https://doi.org/10.1117/12.10.1117/1.3266497

KEYWORDS: Terahertz radiation, Plasmons, Plasma, Bolometers, Transistors, Field effect transistors, Silicon, Metals, Spectroscopy, Black bodies

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Proceedings Article | 25 May 2004 Paper

Paper

1/f noise in GaN/AlGaN heterostructure field effect transistors under condition of strong geometric magnetoresistance

Sergey Rumyantsev, Michael Shur, Wojciech Knap, Nina Dyakonova, Fabien Pascal, Alain Hoffman, Y. Ghuel, C. Gaquiere, D. Theron

Proceedings Volume 5470, (2004) https://doi.org/10.1117/12.546748

KEYWORDS: Magnetism, Resistance, Field effect transistors, Heterojunctions, Gallium nitride, Transistors, Aluminum nitride, Temperature metrology, Gallium arsenide, Metalorganic chemical vapor deposition

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Proceedings Article | 30 August 1993 Paper

Paper

Ultralow background radiation far infrared spectroscopy based on the magnetically tunable selective sources, filters and detectors

W. Knap

Proceedings Volume 2104, 21042P (1993) https://doi.org/10.1117/12.2298529

KEYWORDS: Sensors, Magnetism, Far infrared, Spectroscopy, Optical filters, Magnetic sensors, Gallium arsenide, Chromium, Infrared sensors, Tunable filters

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Proceedings Article | 30 August 1993 Paper

Paper

Far infrared radiation (FIR) sources based on impurity emissionfrom selectively doped multi quantum wells (MQW)

W. Knap

Proceedings Volume 2104, 21042S (1993) https://doi.org/10.1117/12.2298532

KEYWORDS: Far infrared, Quantum wells, Magnetism, Bolometers, Sensors, Semiconductors, Electronics, Niobium, Superlattices, Electrical engineering

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Proceedings Article | 1 October 1991 Paper

Paper

Far infrared spectrometer based on the cyclotron resonance emission source

W. Knap

Proceedings Volume 1576, 157643 (1991) https://doi.org/10.1117/12.2297860

KEYWORDS: Magnetism, Spectroscopy, Gallium arsenide, Far infrared, Infrared spectroscopy, Sensors, Liquids, Helium, Copper, Magnetic sensors

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Showing 5 of 37 publications

Conference Committee Involvement (11)

Millimetre Wave and Terahertz Sensors and Technology XIII

23 September 2020 | Online Only, United Kingdom

Millimetre Wave and Terahertz Sensors and Technology XII

9 September 2019 | Strasbourg, France

Millimetre Wave and Terahertz Sensors and Technology

10 September 2018 | Berlin, Germany

Terahertz Emitters, Receivers, and Applications IX

19 August 2018 | San Diego, California, United States

Millimetre Wave and Terahertz Sensors and Technology

11 September 2017 | Warsaw, Poland

Showing 5 of 11 Conference Committees

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