Electrically Tunable Polarisation-Independent Blue-Phase Liquid Crystal Binary Phase Grating Via Phase-Separated Composite Films

Keywords

Blue-phase liquid crystal; diffraction; phase grating; photopolymerisation-induced phase separation

Abstract

A simple method for fabricating polarisation-independent blue-phase liquid crystal phase grating is demonstrated by implementing photopolymerisation-induced phase separation through a binary photomask. The dynamic focusing property of the proposed liquid crystal grating is independent of the polarisation state of incident light. The efficiency of various diffraction orders for the phase grating was measured as a function of the applied voltage. Experimental results show that the maximum diffraction efficiency reaches 36% for the ±1 order, which approaches the theoretical limit ~41%. The measured rise time is 1.4 ms and fall time is 2.2 ms. Such a tunable grating has great potential for photonic applications.

Publication Date

8-9-2017

Publication Title

Liquid Crystals

Volume

44

Issue

10

Number of Pages

1559-1565

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1080/02678292.2017.1303094

Socpus ID

85015211901 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85015211901

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