Design of electrically tunable meta-color using liquid crystal modulator

Abstract

Structural color induced by reflection or transmission of light from micro- or nano-structures has high resolution, environmental protection and high durability against chemical pigments and dyes. Accordingly, metasurface (MS) that is composed of structures with subwavelength-scale has been proposed for promising an optical platform to realize the structural color. Moreover, recent researches of meta-color head to dynamic color modulator with liquid crystals (LCs). In this work, we propose the tunable meta-color via integration of reflective metasurface with LC modulator. The system is consisted of polarization dependence metasurface and polarization modulator LCs. The polarization of the light is controlled by reorientation of LCs with in-plane electrical field. As a result, we realized the full-color active system for RGB colors with grayscale. This work was supported by the Korea National Research Foundation (NRF-2021R1A4A1030944 & 2021R1A2C2095010).