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Proceedings Paper

Fast flexoelectro-optic liquid-crystal phase-only modulators (Conference Presentation)
Author(s): Xiuze Wang; Julian Fells; Taimoor Ali; Jiade Lin; Chris Welch; Georg Mehl; Martin Booth; Timothy Wilkinson; Stephen Morris; Steve Elston

Paper Abstract

We have demonstrated a Liquid crystal (LC) analog phase modulator based on the flexoelectric-optic effect that can achieve full 2π phase modulation with sub-millisecond switching speed. The LC mixture in the device consists of the bimesogen CBC7CB with chiral dopant R5011 that can exhibit ±𝜋/4 rotation of the optic axis for an electric field of ±4.2Vμm^(-1). This is then converted to a ±π phase modulation with the aid of a chiral reflector and a quarter waveplate. The residual amplitude modulation is found to be very low, and we show how these elements can be combined to form a integrated device.

Paper Details

Date Published: 9 March 2020
Proc. SPIE 11303, Emerging Liquid Crystal Technologies XV, 1130309 (9 March 2020); doi: 10.1117/12.2545786
Show Author Affiliations
Xiuze Wang, Univ. of Oxford (United Kingdom)
Julian Fells, Univ. of Oxford (United Kingdom)
Taimoor Ali, Univ. of Oxford (United Kingdom)
Jiade Lin, Univ. of Oxford (United Kingdom)
Chris Welch, The Univ. of Hull (United Kingdom)
Georg Mehl, The Univ. of Hull (United Kingdom)
Martin Booth, Univ. of Oxford (United Kingdom)
Timothy Wilkinson, Univ. of Cambridge (United Kingdom)
Stephen Morris, Univ. of Oxford (United Kingdom)
Steve Elston, Univ. of Oxford (United Kingdom)

Published in SPIE Proceedings Vol. 11303:
Emerging Liquid Crystal Technologies XV
Liang-Chy Chien; Dirk J. Broer, Editor(s)

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