期刊
LIQUID CRYSTALS
卷 49, 期 11, 页码 1420-1427出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/02678292.2022.2037765
关键词
Liquid crystal; photoalignment; azo dye; grating; quasicrystal pattern
资金
- Ministry of Science and Technology, Taiwan [MOST 108-2112-M-150-001, MOST 108-2112-M-019-001-]
A simple method for generating liquid crystal (LC) gratings with crystal/quasicrystal/kaleidoscopic patterns via photoalignment is proposed in this study. The recorded patterns are electro-optically tunable and possess polarisation-independent diffraction efficiency.
In this study, a simple method for generation of liquid crystal (LC) grating with crystal/quasicrystal/kaleidoscopic patterns via photoalignment is proposed. The crystal/quasicrystal/kaleidoscopic patterns are created using multiple-beam interference when the recording beam is divided into multiple beams by passing a multiple-aperture mask and focused by a lens. Two-dimensional (2D) patterns are recorded on LC cells based on the laser-induced adsorption of azo dyes that guide the orientation of the LC molecules. Measurements indicate that the 2D LC gratings with crystal/quasicrystal patterns are electro-optically tunable and possess polarisation-independent diffraction efficiency.
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