https://orcid.org/0000-0003-1936-195X
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ABSTRACT
We report on fast-switching and high-efficient optical beam steering based on a polymerisable liquid crystal polarisation grating (PG) in combination with ferroelectric liquid crystal (FLC) phase shutter. The PG was fabricated in a convenient single-step holographic exposure process using photo-sensitive azo-dye material as alignment layer for liquid crystal (LC) director. A binary electro-optical FLC was employed for circular polarisation selection, which enables the electro-tunable steering of the combined system. The efficiency of 95.7% with 82 μs switching time is obtained for 1064 nm laser. This work provides a versatile candidate for non-mechanical beam steering devices.
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Disclosure statement
No potential conflict of interest was reported by the authors.
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Funding
The supports of the National Natural Science Foundation of China (Grant No. 61875004, 61405009, 61204063) are gratefully acknowledged.