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Communication dans un congrès

Beyond the Dynamic range approach In noise evaluation for Terahertz Time domain spectrometers

Clemence Muller, Melanie Lavancier, Jeyan Bichon, Theo Hannotte, Jean-Francois Lampin, Sophie Eliet, Romain Peretti

THz-TDS is used for a myriad of purposes. Still today, the usual way to compare different system in terms of signal to noise ratio is to look at the dynamic range. We propose here a more reliable method based on statistics and will show results on two systems (Toptica and Menlo).

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9566941⟩. ⟨hal-03500148⟩

Communication dans un congrès

Polarization control of emitted THz waves using spintronic emitters with anisotropic magnetic layers & birefringence characterization of Quartz

Geoffrey Lezier, Pierre Kolejak, Jean-Francois Lampin, Kamil Postava, Mathias Vanwolleghem, Nicolas Tiercelin

We demonstrate that spintronic TeraHertz emitters using uni-axial anisotropic FeCo/TbCo 2 /FeCo ferromagnetic layers allow the polarization control of the THz emitted wave thanks to the Stoner-Wohlfarth coherent rotation of magnetization when submitted to a magnetic field along hard axis. The…

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. ⟨10.1109/IRMMW-THz50926.2021.9567537⟩. ⟨hal-03584687⟩

Communication dans un congrès

[Invited] Locking of terahertz semiconductor dual-comb laser sources

Hua Li, Yiran Zhao, Ziping Li, Kang Zhou, J. Cao, Dong Xu, S Barbieri

We report on an active stabilization of a terahertz quantum cascade laser (QCL) dual-comb source by phase locking one of the dual-comb lines. Although only one dual-comb line is locked, the phase noise of other dual-comb lines close to the phase locked line is significantly reduced. Furthermore, it…

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9567050⟩. ⟨hal-03448750⟩

Communication dans un congrès

Complex refractive indices in the TeraHertz domain of samples from atmospheric aerosol sources

Jeyan Bichon, Melanie Lavancier, Denis Petitprez, Alexandre Deguine, D. Hourlier-Bahloul, Karine Deboudt, Hervé Herbin, Guillaume Ducournau, Romain Peretti, Sophie Eliet

We report the TeraHertz (THz) characterization of calcium carbonate (CaCO3) particles, one of the major components of desert dust, to determine the real and imaginary parts of their complex refractive indices. The optical characterization is done by TeraHertz Time Domain Spectroscopy (THz-TDS)…

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1163, ⟨10.1109/irmmw-thz50926.2021.9566988⟩. ⟨hal-03403999⟩

Communication dans un congrès

SiGe Based LNA for Data Communication Applications at 211 GHz

Haitham Ghanem, Sylvie Lepilliet, Daniel Gloria, Francois Danneville, Guillaume Ducournau

We report the use of a silicon based 211 GHz preamplifier for THz links. A test bench setup is assembled to evaluate the performance of the amplifier using a uni-traveling-carrier photodiode (UTC-PD) as the source of a 5Gbps modulated signal. The Bit Error Rate curve was extracted versus the input…

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9567152⟩. ⟨hal-03584574⟩

Communication dans un congrès

A criterion to compare permittivity models in the terahertz range

Melanie Lavancier, Nabil Vindas Yassine, Juliette Vlieghe, Jean-Francois Lampin, Romain Peretti

We present a method to take experimental noise in THz-TDS into account during the fitting process. With its implementation in our software fit@TDS, we were able to fit accurately the spectrum of the golden sample: a lactose pellet.

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9567242⟩. ⟨hal-03584667⟩

Communication dans un congrès

Magneto-electric control of polarization in spintronic terahertz emitters

Nicolas Tiercelin, Geoffrey Lezier, Pierre Kolejak, Jean-Francois Lampin, Yannick Dusch, Kamil Postava, Mathias Vanwolleghem

Magnetoelectric control of the emitted polarization of THz waves was demonstrated for the first time in spintronic emitters thanks to the use of a magnetostrictive ferromagnetic layer in an emitter deposited on top of a ferroelectric relaxor substrate.

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9567383⟩. ⟨hal-03584700⟩

Communication dans un congrès

Optimized optical cavity for maximal enhancement of terahertz spintronic emission

Pierre Kolejak, Geoffrey Lezier, Kamil Postava, Jean-Francois Lampin, Nicolas Tiercelin, Mathias Vanwolleghem

Spintronic terahertz emitters are recently developed broadband sources for THz applications based on the ultrafast spin-diffusion in ferromagnetic/nonmagnetic ultra-thin multilayers. We present the enhancement of the terahertz emission using the integration of an optimized SiO 2 /TiO 2 photonic…

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9566885⟩. ⟨hal-03584675⟩

Communication dans un congrès

Up to 100 Gbit/s short link using 300 GHz band Yagi-Uda antenna

Aritrio Bandyopadhyay, Fabio Pavanello, Emilien Peytavit, Jean-Francois Lampin, Malek Zegaoui, Mohammed Zaknoune, P. Szriftgiser, Guillaume Ducournau

We report on the use of a Yagi-Uda antenna on polymer substrate used for indoor 300 GHz data-link applications. The Yagi-Uda antenna-based data-link is validated for up to QAM-16 signals (100 Gbit/s).

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9566991⟩. ⟨hal-03413395⟩

Communication dans un congrès

New laser lines from a terahertz ammonia laser pumped by a quantum cascadelaser and their application to high-resolution spectroscopy

Jean-Francois Lampin, Marie-Helene Mammez, Dominique Mammez, Thomas Hearne, Zachary Buchanan, Olivier Pirali, Marie-Aline Martin-Drumel, Guillaume Ducournau, Sophie Eliet, Francis Hindle, S Barbieri, Pascale Roy, Gaël Mouret

We present an experimental investigation into new continuous-wave laser lines from a terahertz ammonia laser pumped by a quantum cascade laser. These lines were investigated with the help of a molecular figure of merit calculated from spectroscopic parameters available in molecular databases. We…

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1168, ⟨10.1109/IRMMW-THz50926.2021.9566884⟩. ⟨hal-03448763⟩