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Crystals 2017, 7(6), 182;

Switchable Two-Dimensional Liquid Crystal Grating in Blue Phase

Department of Physics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
Department of Optometry, Chung Shan Medical University, Taichung 40201, Taiwan
Author to whom correspondence should be addressed.
Received: 11 May 2017 / Revised: 18 June 2017 / Accepted: 19 June 2017 / Published: 21 June 2017
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We demonstrate a switchable two-dimensional phase grating in blue phase liquid crystal (BPLC), which is fabricated by sawtooth in-plane-switch (IPS) electrodes. They are used to generate the horizontal electric field on a single indium-tin-oxide (ITO) glass substrate and, as a result, the 1-D and 2-D phase gratings can be mutual switched via different polarizations of incident light with an applied voltage. The first-order diffraction efficiency is up to 20% and 10% for the 1-D and 2-D phase grating at V = 150 V, respectively. Moreover, the rise and decay time is 0.9 and 1.1 ms, respectively, which is suitable for wide applications of high-speed optical manipulations. View Full-Text
Keywords: in-plane-switch sawtooth electrode; blue phase liquid crystal in-plane-switch sawtooth electrode; blue phase liquid crystal

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Huang, B.-Y.; Lin, S.-H.; Lin, K.-C.; Kuo, C.-T. Switchable Two-Dimensional Liquid Crystal Grating in Blue Phase. Crystals 2017, 7, 182.

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