Dr. Stephane A. Boubanga-Tombet Profile

Dr. Stephane A. Boubanga-Tombet

at Telops Inc

SPIE Involvement:

Author

Publications (19)

Proceedings Article | 30 March 2020 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

Proc. SPIE. 11348, Terahertz Photonics

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

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Proceedings Article | 12 September 2019 Presentation

Using terahertz pulses to shed new light on Dirac materials (Conference Presentation)

Rohit Prasankumar, Nicholas Sirica, Prashant Padmanabhan, Stephane Boubanga-Tombet, Pamela Bowlan, Dmitry Yarotski, Stuart Trugman, Jianxin Zhu, Antoinette Taylor

Proc. SPIE. 11124, Terahertz Emitters, Receivers, and Applications X

KEYWORDS: Polarization, Graphene, Spectroscopy, Crystals, Magnetism, Emission spectroscopy, Terahertz radiation, Magneto-optics, Terahertz spectroscopy, Metalloids

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Proceedings Article | 6 September 2019 Paper

Graphene-based van der Waals heterostructures towards a new type of terahertz quantum-cascade lasers

Takayuki Watanabe, Deepika Yadav, Stephane Boubanga Tombet, Akira Satou, Alexander Dubinov, Victor Ryzhii, Taiichi Otsuji

Proc. SPIE. 11124, Terahertz Emitters, Receivers, and Applications X

KEYWORDS: Plasmons, Surface plasmons, Waveguides, Graphene, Quantum efficiency, Quantum cascade lasers, Terahertz radiation, Transistors, Heterojunctions

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Proceedings Article | 13 May 2019 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

Proc. SPIE. 10982, Micro- and Nanotechnology Sensors, Systems, and Applications XI

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

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Proceedings Article | 1 March 2019 Presentation + Paper

Graphene-based 2D-heterostructures for terahertz lasers and amplifiers

D. Yadav, S. Boubanga-Tombet, A. Satou, T. Tamamushi, T. Watanabe, T. Suemitsu, H. Fukidome, M. Suemitsu, A. Dubinov, V. Popov, M. Ryzhii, V. Mitin, M. Shur, V. Ryzhii, T. Otsuji

Proc. SPIE. 10917, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XII

KEYWORDS: Plasmonics, Plasmons, Optical amplifiers, Scattering, Graphene, Photons, Electrons, Terahertz radiation, Transistors, Optical pumping

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Proceedings Article | 14 May 2018 Presentation

Real time airborne gas detection using thermal hyperspectral imaging (Conference Presentation)

Stephane Boubanga Tombet, Alexandrine Huot, Eric Guyot, Vincent Farley, Frederick Marcotte, Martin Chamberland

Proc. SPIE. 10661, Thermosense: Thermal Infrared Applications XL

KEYWORDS: Hyperspectral imaging, Environmental monitoring, Safety, Cameras, Air contamination, Fourier transforms, Clouds, Associative arrays, Explosives, Thermal energy technology

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Proceedings Article | 14 May 2018 Presentation

Thermal infrared hyperspectral imaging for chemical mapping of an open mine (Conference Presentation)

Stephane Boubanga Tombet, Alexandrine Huot, Iwan Vitins, Éric Guyot, Frédérick Marcotte, Martin Chamberland

Proc. SPIE. 10661, Thermosense: Thermal Infrared Applications XL

KEYWORDS: Long wavelength infrared, Thermography, Hyperspectral imaging, Infrared imaging, Minerals, Cements, Mining, Raw materials, Infrared radiation, Industrial chemicals

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The hyperspectral chemical mapping of open mines exploited by industries are among the possible applications that could possibly benefit from thermal infrared long-distance survey. More specifically the cement production essential in the constructions of our cities. The cement is made by mixing different raw materials and firing them in order to achieve precise chemical proportions of lime, silica, alumina and iron in the finished product. The quality of cement is therefore directly related to the chemistry of the raw materials used. Approximately 80 to 90% of the raw material is limestone. Clayey raw material accounts for between 10 to 15%, although precise amounts vary. Magnesium carbonate, which may be present in limestone, is the main undesirable impurity. The level of magnesia (MgO) should not exceed 5% and many producers prefer a maximum of 3%; this excludes dolomite or dolomitic limestones for the manufacture of cement. In this work, we conducted thermal infrared (TIR) hyperspectral imaging for mineral mapping and mineralogy identification on a pit wall with Juracement at Cornaux using hyperspectral camera. This passive thermal infrared hyperspectral research instrument based on Fourier transform spectroscopy provides high spectral resolution data. The solid targets such as minerals not only emit but also reflect thermal infrared radiation. Since the two phenomena occur simultaneously, they end-up mixed in the radiance measured at the sensor level. To unveil the spectral features associated with minerals from TIR measurements, the respective contributions of self-emission and reflection in the measurement must be «unmixed» using temperature-emissivity separation (TES) algorithms. We developed a new TES procedure that allowed us to retrieve the spectral emissivity of the different minerals in the investigated scene. The chemical maps of the calcite dolomite mixtures were obtained on the pit wall the investigations were carried out, giving important insights on chemical the quality of the mine.

Proceedings Article | 25 September 2017 Presentation

Ultrafast carrier capture and Auger recombination in individual III-nitride nanowires (Conference Presentation)

Stephane Boubanga Tombet, Jeremy Wright, Ping Lu, Michael R. Williams, Changyi Li, George Wang, Rohit Prasankumar

Proc. SPIE. 10345, Active Photonic Platforms IX

KEYWORDS: Semiconductors, Ultrafast phenomena, Quantum wells, Solid state lighting, Optical microscopy, Gallium nitride, Optoelectronic devices, Nanomaterials, Carrier dynamics, Heterojunctions

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Proceedings Article | 29 April 2016 Paper

Graphene-based van der Waals heterostructures for emission and detection of terahertz radiation

Taiichi Otsuji, Alexander Dubinov, Vladimir Aleshkin, Dmitry Svintsov, Maxim Ryzhii, Stephane Boubanga Tombet, Deepika Yadav, Akira Satou, Vladimir Mitin, Michael Shur, Victor Ryzhii

Proc. SPIE. 9856, Terahertz Physics, Devices, and Systems X: Advanced Applications in Industry and Defense

KEYWORDS: Plasmons, Modulation, Graphene, Electrons, Dielectrophoresis, Terahertz radiation, Acoustics, Heterojunctions, Millimeter wave sensors, Absorption

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Proceedings Article | 22 May 2015 Paper

Graphene active plasmonics for terahertz device applications

Taiichi Otsuji, Alexander Dubinov, Maxim Ryzhii, Stephane Boubanga Tombet, Akira Satou, Vladimir Mitin, Michael Shur, Victor Ryzhii

Proc. SPIE. 9476, Automatic Target Recognition XXV

KEYWORDS: Plasmons, Active plasmonics, Phase modulation, Modulation, Graphene, Electrons, Terahertz radiation, Heterojunctions, Plasma, Absorption

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Proceedings Article | 14 March 2015 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

Proc. SPIE. 9362, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VIII

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

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Proceedings Article | 10 March 2015 Paper

Recent advances in the research toward graphene-based terahertz lasers

Taiichi Otsuji, Akira Satou, Takayuki Watanabe, Stephane Boubanga-Tombet, Maxim Ryzhii, Alexander Dubinov, Vyacheslav Popov, Vladimir Mitin, Michael Shur, Victor Ryzhii

Proc. SPIE. 9382, Novel In-Plane Semiconductor Lasers XIV

KEYWORDS: Plasmons, Scattering, Graphene, Electrons, Terahertz radiation, Phonons, Picosecond phenomena, Optical pumping, Heterojunctions, Optical microcavities

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Proceedings Article | 5 September 2014 Paper

Graphene plasmonic heterostructures for new types of terahertz lasers

Taiichi Otsuji, Victor Ryzhii, Stephane Albon Boubanga Tombet, Takayuki Watanabe, Akira Satou, Maxim Ryzhii, Alexander Dubinov, Vladimir Aleshkin, Vyacheslav Popov, Vladimir Mitin, Michael Shur

Proc. SPIE. 9199, Terahertz Emitters, Receivers, and Applications V

KEYWORDS: Plasmonics, Plasmons, Graphene, Photons, Electrons, Terahertz radiation, Heterojunctions, Optical microcavities, Near field optics, Absorption

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Proceedings Article | 31 January 2014 Paper

Graphene active plasmonics and their applications to terahertz lasers and sensors

Taiichi Otsuji, Akira Satou, Takayuki Watanabe, Alexander Dubinov, Vyacheslav Popov, Stephane Albon Boubanga Tombet, Vladimir Mitin, Victor Ryzhii

Proc. SPIE. 8993, Quantum Sensing and Nanophotonic Devices XI

KEYWORDS: Plasmonics, Plasmons, Active plasmonics, Graphene, Sensors, Photons, Terahertz radiation, Absorbance, Optical microcavities, Absorption

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SPIE Journal Paper | 27 November 2013

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

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 | 29 May 2013 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

Proc. SPIE. 8725, Micro- and Nanotechnology Sensors, Systems, and Applications V

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

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Proceedings Article | 8 January 2013 Paper

Terahertz-wave generation using graphene: toward the creation of graphene injection lasers

T. Otsuji, A. Satou, S. Boubanga Tombet, M. Ryzhii, V. Ryzhii

Proc. SPIE. 8700, International Conference Micro- and Nano-Electronics 2012

KEYWORDS: Plasmons, Scattering, Graphene, Electrons, Terahertz radiation, Phonons, Picosecond phenomena, Optical pumping, Silicon carbide, Absorption

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Proceedings Article | 9 May 2012 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

Proc. SPIE. 8363, Terahertz Physics, Devices, and Systems VI: Advanced Applications in Industry and Defense

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

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Proceedings Article | 26 May 2011 Paper

Terahertz light amplification by stimulated emission of radiation from optically pumped graphene

Taiichi Otsuji, Stephane A. Boubanga Tombet, Silvia Chan, Akira Satou, Victor Ryzhii

Proc. SPIE. 8023, Terahertz Physics, Devices, and Systems V: Advance Applications in Industry and Defense

KEYWORDS: Ultrafast phenomena, Scattering, Graphene, Photons, Crystals, Electrons, Terahertz radiation, Phonons, Picosecond phenomena, Optical pumping

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Showing 5 of 19 publications

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