All-Dielectric Metasurface with Ultrahigh Color Filtering and Polarization-Independent/Dependent Characteristics

Abstract

All-dielectric nanostructure-based color filter (CF) has attracted huge interest in many fields due to its excellent optical properties. We present four metasurface-based CFs with different shapes on quartz substrates to generate pure blue, green and red colors. CFs show maximum reflection intensities of 99.6%, 99.7%, and 95.1% and the corresponding spectra bandwidths are 13 nm, 16 nm, and 14 nm for blue, green and red colors, respectively. The proposed metasurface-based CFs possess high color saturations and ultra-narrow bandwidths. In addition, metasurface-based CFs with different shapes show the tunability for color switching characteristics. These CFs designs will potentially benefit reflective display technologies, and their ultrahigh color filtering and polarization-independent/dependent characteristics are particularly useful for high resolution color printing, micro-LED, polarizer-switches, tunable color switches, and so on.