High-efficiency beam manipulation combining geometric phase with anisotropic Huygens surface

被引：23

作者：

Zhao, Wenyu ^{[1
]}

Jiang, Huan ^{[1
]}

Liu, Bingyi ^{[1
]}

Song, Jie ^{[1
,2
]}

Jiang, Yongyuan ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China

[2] Key Lab Microopt & Photon Technol Heilongjiang Pr, Harbin 150001, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2016年 / 108卷 / 18期

基金：

中国国家自然科学基金;

关键词：

METASURFACE; REFLECTION; PROPAGATION;

D O I：

10.1063/1.4948518

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Conventional geometric metasurfaces relying on space-variant metal antennas for beam manipulation suffer from strong Ohmic loss and incomplete polarization conversion. The efficiency is often limited to rather small values, especially when operating in transmission mode. Here, we tackle this challenge by deliberately constructing an equivalent sheet with anisotropic surface electric and magnetic polarizabilities using cross-shaped dielectric antennas. An incident circularly polarized light can be almost fully converted to a transmitted light of opposite helicity with an unprecedented efficiency up to 98%. Such a transmissive metasurface possessing the merits of high-efficiency, non-dispersion, and robust against variations can serve as an outstanding candidate for flat optics, such as anomalous refraction and beam focusing. Published by AIP Publishing.

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