Visible frequency broadband dielectric metahologram by random Fourier phase-only encoding

作者：XuYue Guo,Peng Li,BingJie Li,Sheng Liu,BingYan Wei,Wei Zhu,JinZhan Zhong,ShuXia Qi,JianLin Zhao

摘要：In recent years,metasurfaces that enable the flexible wavefront modulation at sub-wavelength scale have been widely used into holographic display,due to its prominent advantages in polarization degrees of freedom,viewing angle,and achromaticity in comparison with traditional holographic devices.In holography,the computational complexity of hologram,imaging sharpness,energy utilization,reproduction rate,and system indirection are all determined by the encoding method.Here,we propose a visible frequency broadband dielectric metahologram based on the random Fourier phase-only encoding method.Using this simple and convenient method,we design and fabricate a transmission-type geometric phase all-dielectric metahologram,which can realize holographic display with high quality in the visible frequency range.This method encodes the amplitude information into the phase function only once,eliminating the cumbersome iterations,which greatly simplifies the calculation process,and may facilitate the preparation of large area nanoprint-holograms.

发文机构：MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions

关键词：metahologramphaserandomencodingimaging

分类号： O43[机械工程—光学工程]