Chinese Optics Letters, 2020, 18 (8): 080002, Published Online: Jul. 2, 2020
Ferroelectric liquid crystals for fast switchable circular Dammann grating [Invited] Download: 704次
Abstract
Diffractive optical elements attract a considerable amount of attention, mainly due to their potential applications in imaging coding, optical sensing, etc. Application of ferroelectric liquid crystals (FLCs) with photo-alignment technology in diffractive optical elements results in a high efficiency and a fast response time. In this study we demonstrate a circular Dammann grating (CDG) with a diffraction efficiency of 84.5%. The achieved response time of 64 μs is approximately two orders of magnitude faster than the existing response time of nematic liquid crystal devices. By applying a low electric field (V = 6 V) to the FLC CDG, it is switched between the eight-order diffractive state and the transmissive diffraction-free state.
Qi Guo, Tian Liu, Xiaoqian Wang, Zhigang Zheng, Aleksey Kudreyko, Huijie Zhao, V. Chigrinov, Hoi-Sing Kwok. Ferroelectric liquid crystals for fast switchable circular Dammann grating [Invited][J]. Chinese Optics Letters, 2020, 18(8): 080002.