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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-Hélène 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⟩

Communication dans un congrès

[Invited] H2S photoacoustic detection with an integrated THz gas sensor for food quality control

Elias Akiki, Marie-Hélène Mammez, Guillaume Ducournau, Benjamin Walter, Gaël Mouret, Jean-Francois Lampin, Mathias Vanwolleghem

THz photoacoustic (PA) detection of H 2 S gas concentrations on the order of 200 ppm using a Poly-Si membrane as a PA microphone is reported. This result is a first step towards the demonstration of a fully integrated THz PA gas sensor with an expected sensitivity of 10’s of ppb.

46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9567307⟩. ⟨hal-03465148⟩

Communication dans un congrès

Finding the accurate permittivity model for liquid water and heavy water at different temperatures in the Terahertz range

Melanie Lavancier, Jean-Francois Lampin, Romain Peretti

We present a study of liquid water and heavy water in the terahertz range at temperatures between 283K and 348K. We will fit our data with the fit@TDS software that provides a criterion to discriminate good models from others. We will present a comparison between the models proposed in the...

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9567238⟩. ⟨hal-03584658⟩

Communication dans un congrès

Low-Temperature-grown GaAs photoconductors suitable for 1550nm-wavelength illumination

Charbel Tannoury, Maximilien Billet, Christophe Coinon, Jean-Francois Lampin, Emilien Peytavit

In this communication, we show that ultrafast photoconductors based on low-temperature-grown Gallium Arsenide material exhibit photoresponse values reaching 11 mA/W under 1550 nm CW excitation. This is obtained by using an optical microcavity based on a buried metal layer acting as back reflecting...

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9567204⟩. ⟨hal-03584631⟩

Communication dans un congrès

Antennas for a point to multi-point communication system operating in D-band

Giacomo Ulisse, Guillaume Ducournau, Viktor Krozer

Two different antennas were developed for a point to multi-point communication system operating in D-band (110- 170 GHz). The first is a horn antenna with a 20 dB gain and 30° horizontal radiation pattern. The second one is a horn antenna with a focusing dielectric lens that allows to reach a gain...

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9566917⟩. ⟨hal-03464858⟩

Communication dans un congrès

THz s-SNOM imaging of logarithmic spiral antennas

C. Santos, Louis Thomas, Théo Hannotte, Melanie Lavancier, Sophie Eliet, Jean-Francois Lampin, Romain Peretti

Probing the near-field of photonic components at sub-wavelength scale is of high interest to improve the design of future THz devices. We report on the THz near-field imaging of logarithmic spiral antennas by scattering-type scanning near-field optical microscopy (s-SNOM). Our results demonstrate...

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2021, Chengdu, China. pp.1-2, ⟨10.1109/IRMMW-THz50926.2021.9567111⟩. ⟨hal-03467373⟩

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⟩