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Communication Dans Un Congrès Année : 2018

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

Thierry Camps
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Laurent Dupont

Résumé

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.
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Dates et versions

hal-01879173 , version 1 (22-09-2018)

Identifiants

Citer

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. pp.107290H, ⟨10.1117/12.2322138⟩. ⟨hal-01879173⟩
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