Study of a liquid crystal impregnated diffraction grating for active waveguide addressing

Matthias Colard; Benoit Racine; Sylvia Meunier-Della-Gatta; David Grosso; Badre Kerzabi; Kyllian Millard; Yann Lee; Aurélien Shum; Olivier Haeberlé; Christophe Martinez

doi:10.1117/12.2607475

3 March 2022 Study of a liquid crystal impregnated diffraction grating for active waveguide addressing

Matthias Colard, Benoit Racine, Sylvia Meunier-Della-Gatta, David Grosso, Badre Kerzabi, Kyllian Millard, Yann Lee, Aurélien Shum, Olivier Haeberlé, Christophe Martinez

Author Affiliations +

Proceedings Volume 12023, Emerging Liquid Crystal Technologies XVII; 1202302 (2022) https://doi.org/10.1117/12.2607475
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Liquid Crystals are birefringent materials, which address many applications such as visualization with Liquid Crystal Display (LCD) or beam shaping with Liquid Crystal on Silicon devices (LCoS). Recently, several research teams proposed using liquid crystals in photonics devices applied to new kinds of projection displays. Augmented Reality (AR) is one of the domains, which could benefit from these developments, thanks to the necessity to create active and transparent optical function. In this contribution, we present recent works at CEA Leti to develop a switchable photonic extraction grating adapted to a specific near-eye device. Two different technics are detailed and studied with FDTD simulations. We also show first experimental characterization of an impregnated diffraction grating used in a free space optical set-up

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Matthias Colard, Benoit Racine, Sylvia Meunier-Della-Gatta, David Grosso, Badre Kerzabi, Kyllian Millard, Yann Lee, Aurélien Shum, Olivier Haeberlé, and Christophe Martinez "Study of a liquid crystal impregnated diffraction grating for active waveguide addressing", Proc. SPIE 12023, Emerging Liquid Crystal Technologies XVII, 1202302 (3 March 2022); https://doi.org/10.1117/12.2607475

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