Color animation by dielectric metasurface hologram made of silicon nanopillar

Abstract

A multicolor holographic animation was designed and demonstrated by using dielectric metasurface hologram that consists of silicon nanopillars at the wavelengths of 445, 532, 633 nm. Each silicon pillar acts as a waveguide to produce phase delay depending on the width and height. Phase delay and transmittance of pillars are calculated by using finite element method and mapped to express phase distribution of a hologram calculated from the iterative Fourier transform algorithm. The hologram is fabricated on a silicon on sapphire (SOS) substrate by electron beam lithography. The holographic movie was successfully reproduced by laser illumination at the wavelengths of 445, 532, 633 nm.