Independent phase manipulation of co-and cross-polarizations with all-dielectric metasurface  

作　　者：Haoyu Wang Zhiyu Zhang Kun Zhao Wen Liu Pei Wang Yonghua Lu 王浩宇;张植宇;赵锟;刘文;王沛;鲁拥华(Department of Optics and Optical Engineering,University of Science and Technology of China,Hefei 230026,China;USTC Center for Micro and Nanoscale Research and Fabrication,University of Science and Technology of China,Hefei 230026,China;Advanced Laser Technology Laboratory of Anhui Province,Hefei 230026,China)

机构地区：[1]Department of Optics and Optical Engineering,University of Science and Technology of China,Hefei 230026,China [2]USTC Center for Micro and Nanoscale Research and Fabrication,University of Science and Technology of China,Hefei 230026,China [3]Advanced Laser Technology Laboratory of Anhui Province,Hefei 230026,China

出　　处：《Chinese Optics Letters》2021年第5期100-105,共6页中国光学快报（英文版）

基　　金：the National Natural Science Foundation of China(NSFC)(Nos.11674303 and 11574293);the Anhui Provincial Science andTechnology Major Projects(No.18030901005)。

摘　　要：Phase carried by two orthogonal polarizations can be manipulated independently by controlling both the geometric size and orientation of the dielectric nanopost.With this characteristic,we demonstrate a novel multifunctional metasurface,which converts part of the incident linearly polarized light into its cross-polarization and encodes the phase of the two orthogonal polarizations independently.A beam splitter and a bifocal metalens were realized in a single-layer dielectric metasurface by this approach.We fabricated the bifocal metalens and demonstrated that two focal spots in orthogonal polarizations can be separated transversely or longitudinally at will.The proposed approach shows a new route to design multifunctional metasurfaces with various applications in holography and three-dimensional display.

关 键 词：multifunctional metasurface polarization conversion beam splitting bifocal metalens 

分 类 号：TB34[一般工业技术—材料科学与工程]