Novel optical devices, materials, structure and applications (1)

[ALPS30-03] 3D metasurface holograms of SiN for multicolor projection

*Tamaki Onozawa¹, Junpei Beppu¹, Masakazu Yamaguchi¹, Kentaro Iwami¹ (1. Tokyo University of Agriculture and Technology)

The high 95% diffraction efficiency and 83% transmittance were achieved in 3D metasurface holograms made of SiN high-aspect-ratio nanopillars (1394 nm). It enables observation with the naked eye and the time-division-multiplexing method for multicolor projection.