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2. LT-GaAs-based photomixers with > 2 mW peak output power in the 220-325 GHz frequency band

Author

Bavedila, F., Okada, E., Lampin, J-F., Ducournau, G., Peytavit, E., Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Photonique THz - IEMN (PHOTONIQUE THz - IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Renatech Network, and Photonique THz - IEMN (PHOTONIQ THz - IEMN)

Subjects
[SPI]Engineering Sciences [physics], 0103 physical sciences, 02 engineering and technology, 021001 nanoscience & nanotechnology, 010306 general physics, 0210 nano-technology, 01 natural sciences
Abstract

International audience; It is shown in this communication that a LT-GaAs photomixer based on an optically resonant cavity is able to generate peak output powers above 2 mW in the 220-325 GHz frequency band.

Published
2019
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10. Short bends using curved mirrors in silicon waveguides for terahertz waves.

Author

Verstuyft M, Akiki E, Vanwolleghem M, Ducournau G, Lampin JF, Walter B, Bavedila F, Lebouvier É, Faucher M, and Kuyken B

Abstract

Dielectric waveguides are capable of confining and guiding terahertz waves along sub-wavelength sized structures. A small feature size allows for a denser integration of different photonic components such as modulators, beam-splitters, wavelength (de)multiplexers and more. The integration of components on a small scale requires bending of the waveguides. In this paper we demonstrate a very short silicon 90°-bend, based on total internal reflection on an elliptically curved outer facet and a rounding of the inner corner joining two waveguides, with an average loss of 0.14 dB per bend in the 600-750 GHz range.

Published
2022
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11. Over-wavelength pitch sized diffraction gratings for augmented reality applications.

Author

Drazic V, Shramkova O, Varghese B, Blondé L, De La Perrière VB, Schiffler J, Twardowski P, Lecler S, Walter B, Mairiaux E, Bavedila F, Faucher M, and Allié V

Abstract

Waveguide based optical combiners for augmented reality (AR) glasses are integrating several surface relief gratings (SRG) whose pitch sizes can be as small as 200 nm for the blue wavelength. All SRG components exploit the first diffraction order to couple in and out or to deviate the light. We present SRG using higher diffraction orders featuring over-wavelength pitch sizes. Our gratings use the edge wave (EW) diffraction phenomenon to steer light in the preferred far field direction.

Published
2022
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