Nonreciprocal Wavefront Manipulation in Synthetically Moving Metagratings

被引：17
作者：
Ra'di, Younes [1 ]
Alu, Andrea [1 ,2 ]
机构：
[1] CUNY, Adv Sci Res Ctr, Photon Initiat, New York, NY 10031 USA
[2] CUNY, Grad Ctr, Phys Program, New York, NY 10016 USA
来源：
PHOTONICS | 2020年 / 7卷 / 02期
基金：
美国国家科学基金会;
关键词：
metagrating; metasurface; bianisotropy; nonreciprocity; METASURFACES;
D O I：
10.3390/photonics7020028
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We introduce a metasurface platform for nonreciprocal wave manipulation. We study metagratings composed of nonreciprocal bianisotropic particles supporting synthetic motion, which enable nonreciprocal energy transfer between tailored Floquet channels with unitary efficiency. Based on this framework, we derive the required electromagnetic polarizabilities to realize a metagrating supporting space wave circulation with unitary efficiency for free-space radiation and design a microwave metagrating supporting this functionality. The proposed concept opens new research venues to control free-space radiation with high efficiency beyond the limits dictated by Lorentz reciprocity.
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页数：7
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