High Reflectance of Cholesteric Liquid Crystal Reflector by Double-Layer Structure

Cholesteric liquid crystal (CLC) has a helical structure with either of left-handedness or right-handedness. Due to the helical structure, the selective reflection occurs depending on the chrial pitch. However, the reflectance of the CLC layer is theoretically limited to 50% because only one of right- or left-handed circularly polarized light is reflected. In this paper, we demonstrate high reflectance with double layer structure for the color reflector application.