Liquid crystal based tunable PIN-photodiodes for detection around 1.55-µm

Abstract : In this work, we report InGaAs based photodiodes integrating liquid crystal (LC) microcells resonant microcavity on their surface. The LC microcavities monolithically integrated on the photodiodes act as a wavelength selective filter for the device. Photodetection measurements performed with a tunable laser operating in the telecom S and C bands demonstrated a wavelength sweep for the photodiode from 1480 nm to 1560 nm limited by the tuning range of the laser. This spectral window is covered with a LC driving voltage of 7V only, corresponding to extremely low power consumption. The average sensitivity over the whole spectral range is 0.4 A/W, slightly lower than 0.6 A/W for similar photodiodes that do not integrate such a LC tunable filter. The quality of the filter integrated onto the surfaces of the photodiodes is constant over a large tuning range (70 nm), showing a FWHM of 1.5 nm.
Type de document :
Communication dans un congrès
SPIE Optics+Photonics - Nanoscience+Engineering 2018, Aug 2018, San Diego, United States. SPIE, Proc. SPIE, 10729, pp.107290H, 2018, Optical Sensing, Imaging, and Photon Counting: From X-Rays to THz. 〈10.1117/12.2322138〉
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https://hal.archives-ouvertes.fr/hal-01879173
Contributeur : Christophe Levallois <>
Soumis le : samedi 22 septembre 2018 - 14:24:18
Dernière modification le : mercredi 19 décembre 2018 - 15:26:08
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Christophe Levallois, Cyril Paranthoen, Benjamin Boisnard, Thierry Camps, Benattou Sadani, et al.. Liquid crystal based tunable PIN-photodiodes for detection around 1.55-µm. SPIE Optics+Photonics - Nanoscience+Engineering 2018, Aug 2018, San Diego, United States. SPIE, Proc. SPIE, 10729, pp.107290H, 2018, Optical Sensing, Imaging, and Photon Counting: From X-Rays to THz. 〈10.1117/12.2322138〉. 〈hal-01879173〉

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