太赫兹辐射
极化(电化学)
光学
斯托克斯参量
电介质
纳米光子学
线极化
物理
光电子学
等离子体子
硅
各向异性
涡流
超材料
材料科学
化学
激光器
物理化学
散射
热力学
作者
Shuyan Zhang,Xuechun Zhang,Lili Tang,Zheng‐Gao Dong
标识
DOI:10.35848/1347-4065/acf018
摘要
Abstract All-dielectric metasurfaces can realize flexible full-vector manipulations of the complex optical field, without confronting the loss issues of plasmonic counterparts, and thus have been proposed for lots of nanophotonic functionalities. In this work, a silicon-bar metasurface is designed to generate multifunctional focusing characteristics, which act as duplexed metalens with unlocked topological charges of terahertz vortex for orthogonal linearly-polarized incident waves. It achieves full phase modulation by tuning lateral sizes of the bar without the anisotropic orientation requirement associated with the geometric phase, which is consequently of high efficiency since no polarization conversion is involved in this duplexed all-dielectric vortex metalens.
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