High-efficiency chiral meta-lens

被引：54

作者：

Groever, Benedikt ^{[1
]}

Rubin, Noah A. ^{[1
]}

Mueller, J. P. Balthasar ^{[1
]}

Devlin, Robert C. ^{[1
]}

Capasso, Federico ^{[1
]}

机构：

[1] Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA

来源：

SCIENTIFIC REPORTS | 2018年 / 8卷

基金：

美国国家科学基金会;

关键词：

POLARIZATION; PHASE; REFLECTION;

D O I：

10.1038/s41598-018-25675-3

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We present here a compact metasurface lens element that enables simultaneous and spatially separated imaging of light of opposite circular polarization states. The design overcomes a limitation of previous chiral lenses reliant on the traditional geometric phase approach by allowing for independent focusing of both circular polarizations without a 50% efficiency trade-off. We demonstrate circular polarization-dependent imaging at visible wavelengths with polarization contrast greater than 20dB and efficiencies as high as 70%.

引用

页数：6

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