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Affichage de 1651 à 1660 sur 16474

Communication dans un congrès

59 Lines Measurement in a Single Experiment using Super-Resolution TDS

Noureddin Osseiran, Aditya Raj, Théo Hannotte, Sophie Eliet, Romain Peretti

Terahertz time domain spectroscopy (THz-TDS) has emerged as a versatile tool for investigating the physical properties of materials. However, its potential for gas-phase studies has remained largely unexplored, and it gained attention recently. We present here an extended application of the...

2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Sep 2023, Montreal, Canada. pp.1-2, ⟨10.1109/IRMMW-THz57677.2023.10299388⟩. ⟨hal-04277652⟩

Communication dans un congrès

On-wafer RF high-power measurement with an LSMO load at 40 GHz

T. Quinten, Jean-Francois Lampin, Etienne Okada, V. Pierron, C. Gunther, Laurence Méchin, B. Walter, B. Guillet

We present a novel technique to measure RF power directly in the plane of a DUT using a CPW (CoPlanar Waveguide) test-pattern as an on-wafer power meter. Preliminary results show that we have been able to measure 24 dBm at 40 GHz.

2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Sep 2023, Montreal, Canada. pp.1-2, ⟨10.1109/IRMMW-THz57677.2023.10299045⟩. ⟨hal-04277896⟩

Communication dans un congrès

Mid-infrared quantum well photodetectors with 100GHz 3dB-bandwidth at room temperature

Q. Lin, M. Hakl, Jean-Francois Lampin, W. Wan, J. Cao, H. Li, Emilien Peytavit, S Barbieri

Ultra-fast, GaAs-based multi-quantum well photodetectors operating in the 9.5-11.5um range are demonstrated, with a 3dB-cutoff bandwidth of 100GHz at room temperature. The multi quantum-well active region is sandwiched between a bottom metallic ground-plane and a top two-dimensional array of patch...

2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Sep 2023, Montreal, Canada. pp.1-2, ⟨10.1109/IRMMW-THz57677.2023.10299145⟩. ⟨hal-04277577⟩

Communication dans un congrès

Adapting terahertz spintronic emitters towards maximum performance

Pierre Koleják, Geoffrey Lezier, Lukáš Halagačka, Baptiste Mathmann, Daniel Vala, Zuzana Gelnárová, Yannick Dusch, Jean-François Lampin, Nicolas Tiercelin, Kamil Postava, Mathias Vanwolleghem

The boom in terahertz technologies of the last few decades is now not limited to the use of electric charge, but also fully exploits spin. Revolutionary spintronic terahertz emitters (STEs) offer versatile usage under a wide range of visible and infrared excitation wavelengths, arbitrary reflection...

2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Sep 2023, Montreal, Canada. pp.1-2, ⟨10.1109/IRMMW-THz57677.2023.10299199⟩. ⟨hal-04277716⟩

Communication dans un congrès

From Noise analysis to Error Bars on Refractive Index In THz-TDS

Noureddin Osseiran, Jeyan Bichon, Aditya Raj, Théo Hannotte, Sophie Eliet, Romain Peretti

We present a new methodology for computing error bars in THz-TDS experiments and distribute open source software for this purpose. Pursuing our efforts in noise analysis and data processing of THz-TDS experiments, we followed a standard approach to derive the error bars from the simplest quantities...

48th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz), Sep 2023, Montreal, Canada. pp.1-2, ⟨10.1109/IRMMW-THz57677.2023.10299169⟩. ⟨hal-04254689⟩

Communication dans un congrès

Spintronic inverse spin hall photomixing beyond 1THz

Pierre Kolejak, Geoffrey Lezier, Guillaume Ducournau, Jean-Francois Lampin, Nicolas Tiercelin, Mathias Vanwolleghem

We have demonstrated experimentally how ultrabroadband inverse spin Hall emitters present an unprecedented new scheme for room temperature THz CW and frequency comb generation. Building on previous proof-of-principle demonstrations, we demonstrate here by improved experimental developments how this...

2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Sep 2023, Montreal, Canada. pp.1-2, ⟨10.1109/IRMMW-THz57677.2023.10299118⟩. ⟨hal-04277866⟩

Communication dans un congrès

200 Gbit/s terahertz tunneling demultiplexer in 300 GHz band

Daniel Headland, Withawat. Withayachumnankul, Masayuki. Fujita, Tadao Nagatsuma, Pascal Szriftgiser, Guillaume Ducournau

We showcase here the experimental demonstration of demultiplexing terahertz channels with up to 200 Gbit/s aggregated data-rate, using 4 carrier frequencies. The demonstration is carried out in the 300 GHz band. Best error vector magnitude obtained values are in the range 6-9%, with 50 Gbit/s per...

2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Sep 2023, Montreal, Canada. pp.1-2, ⟨10.1109/IRMMW-THz57677.2023.10299212⟩. ⟨hal-04277435⟩

Communication dans un congrès

Low-loss, 1-m long length, hollow-core THz waveguide operating at 1 THz, based on anti-resonant guiding mechanism

Georges Humbert, Jean-Louis Auguste, Guillaume Ducournau, Jean-Francois Lampin

A hollow-core THz waveguide composed of 10 silica capillaries is designed and fabricated. The waveguide based on the anti-resonant guiding mechanism presents a large transmission window (∼>600 GHz) centered at 1 THz, with measured propagation losses below 0.5 dB/m.

2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Sep 2023, Montreal, Canada. pp.1-2, ⟨10.1109/IRMMW-THz57677.2023.10298994⟩. ⟨hal-04277617⟩

Communication dans un congrès

Acousto-Optical Tunable Filter design for efficient diffraction of unpolarised light

Samuel Dupont, Jean-Claude Kastelik, J. Vanhamel, E. Dekemper

Diffraction of optical waves by an acoustic grating is a well-known phenomenon that enables the design of versatile devices useful in photonic systems. For example, acousto-optic tunable filters (AOTFs) can be dynamically tuned by radio-frequency signals. Among possible material choice,...

10th Convention of the European Acoustics Association Forum Acusticum 2023, Sep 2023, Turin, Italy. pp.4935-4938, ⟨10.61782/fa.2023.0505⟩. ⟨hal-04462396⟩

Communication dans un congrès

Design of a Radio Frequency Compensation System, using the Electrical Characterisation of a Multi-Transducer Acousto-Optical Tunable Filter

J. Vanhamel, Samuel Dupont, Jean-Claude Kastelik, E. Dekemper

Acousto-Optical Tunable Filters (AOTFs) make use of the interaction between sound and light. To generate an ultrasound diffraction grating, a Radio-Frequency (RF) signal is applied to a piezoelectric transducer. The optical pass band can be controlled by adapting the properties of this transducer...

10th Convention of the European Acoustics Association Forum Acusticum 2023, Sep 2023, Turin, Italy. pp.6355-6360, ⟨10.61782/fa.2023.0379⟩. ⟨hal-04462347⟩