Abstract

A lot of research on liquid crystal polarization gratings (LCPGs) that can separate circularly polarized light with 100% diffraction efficiency has been conducted in the visible and near-infrared wavelength regions. In this paper, we tried to design and fabricate the LCPGs that are available for use in the mid- and far-infrared (MIR and FIR) wavelength regions. The materials for making LCPGs were selected in view of low absorption characteristics measured by the use of a Fourier-transform infrared (FT-IR) spectrometer. LCPGs designed for 3.88 µm and 9.5–10.6 µm were fabricated, and we evaluated their diffraction properties experimentally. The MIR and FIR LCPGs should open new application fields of LC technologies including polarimetry, spectroscopy, and beam steering.

© 2024 Optica Publishing Group

Design and fabrication of a liquid crystal retarder for the mid- and far-infrared wavelength ranges

Moritsugu Sakamoto, Kuon Kawamura, Masato Suzuki, Kohei Noda, Takeya Unuma, Tomoyuki Sasaki, Nobuhiro Kawatsuki, and Hiroshi Ono
Opt. Mater. Express 14(5) 1139-1148 (2024)

Design and fabrication of a tunable wavelength-selective polarization grating

Kotaro Kawai, Moritsugu Sakamoto, Kohei Noda, Tomoyuki Sasaki, Nobuhiro Kawatsuki, and Hiroshi Ono
Appl. Opt. 55(23) 6269-6274 (2016)

Diffraction characteristics of a non-mechanical beam steering system with liquid crystal polarization gratings

Zishuo Wang, Chunyang Wang, Shuning Liang, and Xuelian Liu
Opt. Express 30(5) 7319-7331 (2022)

Characterization of an uncooled mid-infrared Schottky photodetector based on a 2D Au/PtSi/p-Si nanohole array at a higher light modulation frequency

Ashenafi Abadi, Eslam Abubakr, Masaaki Oshita, Daiji Noda, Ryo Ohta, and Tetsuo Kan
Appl. Opt. 63(8) 2046-2055 (2024)

Rigorous coupled-wave analysis of liquid crystal polarization gratings

Jianghao Xiong and Shin-Tson Wu
Opt. Express 28(24) 35960-35971 (2020)