Electrically Tunable Diffraction Grating Based on Liquid Crystals. (20th June 2018)

• Record Type: Journal Article
• Authors: Tien, Chuen-Lin; Lin, Rong-Ji; Su, Shu-Hui; Horng, Chi-Ting
• Other Names: Ho Daniel Academic Editor.
• Is Part Of: Advances in condensed matter physics. Volume 2018(2018)
• Publication Date: 2018-06-20
• Subjects: Condensed matter -- Periodicals; Condensed matter; Periodicals; 530.41
• DOI: 10.1155/2018/7849529
• Languages: English
• ISSNs: 1687-8124

Abstract

Abstract : A periodic electric field is generated in the grating-like electrodes cell by an applied voltage and results in the reorientation of liquid crystals. The linearly polarized probe beam experienced periodic distribution of refractive index and formed a phase grating. He-Ne laser was used as the probe beam to detect the zeroth-order (o) and first-order (+1) diffraction intensities. The experimental results showed that the diffraction grating can be switched on by applying a small voltage. The optimal first-order diffraction efficiency is about 12%. The dependence of the first-order diffraction efficiency on the polarization of the probed beam is also discussed herein.