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Fast-Response Liquid Crystal for Spatial Light Modulator and LiDAR Applications
oleh: Junyu Zou, Qian Yang, En-Lin Hsiang, Haruki Ooishi, Zhuo Yang, Kifumi Yoshidaya, Shin-Tson Wu
Format: | Article |
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Diterbitkan: | MDPI AG 2021-01-01 |
Deskripsi
We report a new nematic mixture for liquid-crystal-on-silicon spatial light modulator (SLM) and light detection and ranging (LiDAR) applications. The mixture exhibits a relatively high birefringence (Δ<i>n</i>), moderate dielectric anisotropy (Δ<i>ɛ</i>), low viscosity, and reasonably good photostability. To achieve 2π phase change at 5 V, the response time (on + off) is 2.5 ms at 40 °C with <i>λ =</i> 633 nm, and 5.9 ms with <i>λ =</i> 905 nm. After exposure by a blue laser (<i>λ</i> = 465 nm) with a total dosage up to 20 MJ/cm<sup>2</sup>, this mixture shows no sign of photodegradation. Widespread applications of this material for high brightness SLMs, LiDAR, near-eye displays, and head-up displays are foreseeable.