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
• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2021,（5）
• 所属期刊栏目: Nanophotonics,Metamaterials,and Plasmonics
• 页码范围: 100-105
• 页数: 6页
• 语种: 英文
• DOI: 10.3788/COL202119.053601

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 meta-surfaces with various applications in holography and three-dimensional display.