High-efficiency chiral meta-lens

被引：48
|
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%.
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页数：6
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