All-dielectric metasurface with ultrahigh color filtering and polarization-independent/dependent characteristics

The all-dielectric metasurface-based color filter (CF) has attracted huge interest in many fields due to its excellent optical properties. We present four CFs with different shapes on quartz substrates generate blue (B), green (G), and red (R) spectra high purity. show the maximum reflection intensities of 99.6% 99.7% 95.1% (R), their bandwidths are 14, 16, 13 nm for RGB colors, respectively. These proposed possess saturation ultra-narrow bandwidths. In addition, tunability switching polarization-dependent characteristics. CF designs will potentially benefit reflective display technologies, ultrahigh filtering characteristics CF-1 CF-2 particularly useful high-resolution printing micro-LED. Moreover, CF-3 CF-4 make it possible them be applied as polarization switches, tunable so on.