Chinese Optics Letters, 2021, 19 (5): 053601, Published Online: Mar. 3, 2021   

Independent phase manipulation of co- and cross-polarizations with all-dielectric metasurface Download: 770次

Author Affiliations
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
Abstract
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.

Haoyu Wang, Zhiyu Zhang, Kun Zhao, Wen Liu, Pei Wang, Yonghua Lu. Independent phase manipulation of co- and cross-polarizations with all-dielectric metasurface[J]. Chinese Optics Letters, 2021, 19(5): 053601.

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