Flexible tuning of multifocal holographic imaging based on electronically controlled metasurfaces

作     者：OWEN ZENG CHENXIA LI BO FANG ZHI HONG XUFENG JING BOWEN ZENG;CHENXIA LI;BO FANG;ZHI HONG;XUFENG JING

作者机构：Institute of Optoelectronic TechnologyChina Jiliang UniversityHangzhou 310018China Centre for THz ResearchChina Jiliang UniversityHangzhou 310018China College of Metrology&Measurement EngineeringChina Jiliang UniversityHangzhou 310018China 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2024年第12卷第1期

页      面：61-69页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：Natural Science Foundation of Zhejiang Province(LY22F050001,LZ21A040003,LY21F050006) National Natural Science Foundation of China(62175224) 

主　　题：holographic letter excitation 

摘      要：Programmable hyper-coded holography has the advantage of being programmable as well as being flexibly *** coded metamaterials with excellent electromagnetic modulation capability and the ability to control the phase to modulate the spatial radiation field through external excitation in the form of switching can be used to realize low-cost digital *** design a 1-bit encoded programmable metasurface,which is electrically connected to control the PIN diode in the switching state and to switch the condition of each metasurface cell between“0and“1.Using the designed programmable metasurface,we can randomly encode the cell structure to realize single-focus focusing,multi-focusing,and simple holographic letter *** on the nonlinear holographic model,we employ the Gerchberg-Saxton improvement algorithm to modulate the energy distribution at the focus by adjusting the phase ***,we introduce the Fourier convolution principle to regulate the holographic imaging focus flexibly.