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Affichage de 2061 à 2070 sur 16175

Communication dans un congrès

A multiline InP-TRL kit for sub-mmWave characterization of InP-HEMT

R. Younes, Nicolas Wichmann, Sylvie Lepilliet, Guillaume Ducournau, S. Bollaert

We investigate the development of on-wafer multiline Thru-Reflect-Line calibration kits to enable transistor characterization beyond 110 GHz. The final objective is to measure the S parameters of a HEMT having a very high cut-off frequency (up to THz range). A first kit design shows that the use of…

2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2022, Delft, Netherlands. pp.1-2, ⟨10.1109/IRMMW-THz50927.2022.9895722⟩. ⟨hal-03794291⟩

Communication dans un congrès

Noise analysis, noise reduction and covariance estimation for Time domain Spectroscopy

Elsa Denakpo, Theo Hannotte, Melanie Lavancier, Sophie Eliet, Romain Peretti

Time domain spectroscopy is now 30 year old and spread more and more along many fields of analytical sciences. The specificity of this technique reads in its name: measurements are not done in the frequency domain using a dispersive element, but in the time domain. One of the consequences is that…

2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2022, Delft, Netherlands. pp.1-2, ⟨10.1109/IRMMW-THz50927.2022.9895812⟩. ⟨hal-03793402⟩

Communication dans un congrès

Split-ring resonators imaged by THz s-SNOM

Cristiane Santos, Theo Hannotte, Louis Thomas, Benjamin Walter, Melanie Lavancier, Sophie Eliet, Marc Faucher, Jean-Francois Lampin, Romain Peretti

Split-ring resonators (SRRs) are one of the most common building blocks to design metamaterials operating over a large range of frequencies in the electromagnetic spectrum. Here we acquire s-SNOM images with high signal-to-noise ratio on SRRs by scattering-type scanning near-field optical…

2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2022, Delft, Netherlands. pp.1-2, ⟨10.1109/IRMMW-THz50927.2022.9895984⟩. ⟨hal-03835305⟩

Communication dans un congrès

Traveling wave photomixers based on low-temperature-grown Gallium Arsenide reaching 50 mA/W under 1550 nm CW illumination

Charbel Tannoury, Vanessa Avramovic, Etienne Okada, Christophe Coinon, Jean-Francois Lampin, Emilien Peytavit

In this work we present an original design of a traveling-wave photomixer (TWP) based on low-temperature-grown GaAs layer (LT-GaAs) optimized for 1550 nm wavelength excitation. The optical wave is absorbed in the LT-GaAs through an integrated silicon nitride-based waveguide. The optical waveguide…

2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2022, Delft, Netherlands. pp.1-2, ⟨10.1109/IRMMW-THz50927.2022.9895804⟩. ⟨hal-03835235⟩

Communication dans un congrès

On the influence of water on THz vibrational spectral features of molecular crystals

Sergey Mitryukovskiy, Danny Vanpoucke, Theo Hannotte, Melanie Lavancier, D. Hourlier-Bahloul, Goedele Roos, Romain Peretti

The collective vibrations in molecular crystals can be probed using terahertz spectroscopy, providing unique characteristic spectral fingerprints. However, the association of the spectral features to the crystal conformation, crystal phase and its environment is a difficult task. We present a…

2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2022, Delft, Netherlands. ⟨10.1109/IRMMW-THz50927.2022.9896035⟩. ⟨hal-03835255⟩

Communication dans un congrès

Complex refractive index determination of PTFE, TPX and polypropylene windows for TeraHertz broadband spectroscopy

J. Bichon, A. Pillet, A. Sklia, D. Petitprez, Romain Peretti, S. Eliet

We perform TeraHertz characterization of three low-loss polymer candidates, i.e. polytetrafluoroethylene, polymethylpentene, and polypropylene, to choose the material with the proper opto-mechanical properties for aerosol and gas broadband spectroscopy cell windows. Samples are analyzed with the…

2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2022, Delft, Netherlands. pp.1-2, ⟨10.1109/IRMMW-THz50927.2022.9895520⟩. ⟨hal-03794330⟩

Communication dans un congrès

Corrosion monitoring based on diffuse ultrasonic Coda Wave Interferometry technique

Cyril Nicard, Maxime Farin, Olivier Brehault, Ingrid Proriol Serre, Emmanuel Moulin, Pierre Campistron, Lynda Chehami, David Balloy, Farouk Benmeddour, Thierry Dubois, Simon Khelissa, Marwan Abdallah, Guillaume Delaplace

The present study has been conducted in the frame of Interreg SOCORRO2 project (Seeking out corrosion - before it is too late). This European project aims to provide industries with an independent tool based on machine-learning to assess corrosion risks of their installations in contact with sea…

Eurocorr 2022, Aug 2022, Berlin, Germany. ⟨hal-03843741⟩

Communication dans un congrès

Non-linear impairments of 300 GHz MPAs for THz communications

Laurenz John, Dominik Wrana, Benjamin Schoch, Arnulf Leuther, Pascal Szriftgiser, Guillaume Ducournau

In this paper we report on the use of THz photonics techniques to evaluate the impairments induced by non-linear behavior of 300 GHz amplifier blocks. Using a referenced THz photonics IQ generator, the error-vector magnitude evolution is analyzed towards optimum power operation point of the…

2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2022, Delft, Netherlands. pp.1-2, ⟨10.1109/IRMMW-THz50927.2022.9895996⟩. ⟨hal-03794362⟩

Communication dans un congrès

Optoelectronic THz mixer based on iron-doped InGaAs in a plasmonic microcavity

C. Tannoury, V. Merupo, Vanessa Avramovic, R. Kohlhaas, Guillaume Ducournau, B. Globisch, Emilien Peytavit

We present an optoelectronic THz mixer based on irondoped InGaAs integrated into a plasmonic microcavity. The measured conversion loss is as low as ∼30 dB at 300 GHz, which constitutes a 30 dB improvement in comparison to state-of-the-art photoconductors without a plasmonic microcavity. In…

2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2022, Delft, Netherlands. pp.1-1, ⟨10.1109/IRMMW-THz50927.2022.9895790⟩. ⟨hal-03794818⟩

Communication dans un congrès

Spintronic inverse spin hall photomixing: demonstration of THz CW and frequency comb generation

Pierre Kolejak, Geoffrey Lezier, Samir Kassi, Leo Dhevarhidjian, Marie-Aline Martin-Drumel, Olivier Pirali, Guillaume Ducournau, Jean-Francois Lampin, Nicolas Tiercelin, Mathias Vanwolleghem

We demonstrate for the first time a novel THz photomixing paradigm exploiting ultrabroadband inverse spin Hall emitters. Both narrow band (∼20 Hz) CW emission by beating of two stabilized IR DFB lasers on a Pt/CoFeB/W stack is obtained as well as successful spintronic downconversion of a IR…

2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Aug 2022, Delft, Netherlands. pp.1-2, ⟨10.1109/IRMMW-THz50927.2022.9896051⟩. ⟨hal-03835288⟩