Single-layered non-interleaved spin-insensitive metasurfaces for wavefront engineering

作     者：Ata Ur Rahman Khalid Naeem Ullah 韩遇 Urooj Asghar 袁小聪 冯甫 Ata Ur Rahman Khalid;Naeem Ullah;Yu Han;Urooj Asghar;Xiaocong Yuan;Fu Feng

作者机构：Nanophotonics Research CenterShenzhen Key Laboratory of Micro-Scale Optical Information Technology&Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518000China College of Physics and Optoelectronics EngineeringShenzhen UniversityShenzhen 518000China Beijing Engineering Research Center for Mixed Reality and Advanced DisplaySchool of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China Department of PhysicsForman Christian College-UniversityLahore 54600Pakistan 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2023年第21卷第1期

页      面：32-37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] 

主　　题：metasurface spin-insensitivity meta-hologram beam splitter 

摘      要：Metasurfaces,two-dimensional(2D)or quasi-2D arrays of dielectric or metallic meta-atoms,offer a compact and novel platform to manipulate the amplitude,phase,and polarization of incoming wavefronts in a desired manner by engineering the geometry of *** polarization control,spin-insensitive metasurfaces have attracted significant attention due to the robustness of circular polarization against the beam misalignment and multi-path *** now,several efforts have been made to realize polarization-insensitive metasurfaces for circularly polarized(CP)wavefront manipulation;however,these metasurfaces only consider the cross-polarization channels and keep the co-polarization channels *** metasurfaces cannot be considered truly spin-insensitive,as one has to carefully choose the analyzer at ***,by combining the polarization-insensitive geometric phase and engineered propagation phase,we propose a spin-insensitive design principle based on metasurfaces that can perform identical functionality(on co-and crosspolarization channels)irrespective of the handedness of incident/transmitted *** a proof of concept,we design and numerically realize two types of spin-insensitive wavefront engineering devices:(1)spin-insensitive meta-hologram and(2)spin-insensitive beam deflector with power splitting *** proposed work is expected to open up new avenues for developing spin-independent metasurfaces-based devices.