Super-reflector enabled by non-interleaved spin-momentum-multiplexed metasurface

He-Xiu Xu; Guangwei Hu; Xianghong Kong; Yanzhang Shao; Patrice Genevet; Cheng-Wei Qiu

doi:10.1038/s41377-023-01118-1

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Super-reflector enabled by non-interleaved spin-momentum-multiplexed metasurface

Original Articles

- Super-reflector enabled by non-interleaved spin-momentum-multiplexed metasurface
- Light: Science & Applications Vol. 12, Issue 4, Pages: 636-645(2023)
- Affiliations：
  
  1.Air and Missile Defense College, Air Force Engineering University, 710051, Xi'an, China
  2.School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
  3.Department of Electrical and Computer Engineering, National University of Singapore, Singapore, 117583, Singapore
  4.Université Côte d'Azur, CNRS, Centre de Recherche sur l'Hétéro-Epitaxie et ses Applications (CRHEA), 06560, Valbonne, France
- Author bio：
  
  He-Xiu Xu (hxxuellen@gmail.com)
  Cheng-Wei Qiu (eleqc@nus.edu.sg)
- Funds：
- DOI：10.1038/s41377-023-01118-1
  CLC：
- Published：30 April 2023，
  
  Published Online：24 March 2023，
  
  Received：19 October 2022，
  
  Revised：4 February 2023，
  
  Accepted：20 February 2023
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Xu, H. X.et al. Super-reflector enabled by non-interleaved spin-momentum-multiplexed metasurface.Light: Science & Applications,12, 636-645 (2023).
DOI：

Xu, H. X.et al. Super-reflector enabled by non-interleaved spin-momentum-multiplexed metasurface.Light: Science & Applications,12, 636-645 (2023). DOI： 10.1038/s41377-023-01118-1.

摘要

Abstract

Electromagnetic wave multiplexing

especially for that occurring at different incidences (spatial-frequency multiplexing)

is pivotal for ultrathin multifunctional interfaces and high-capacity information processing and communication. It is yet extremely challenging based on passive and compact wave elements

since the wave excitation and scattering channels are exclusively coupled through gradient phases and hence momentum matching condition at the interface. Here

we propose a spin-momentum multiplexed paradigm called a super-reflector enabling on-demand control of both retroreflections and anomalous reflections using a non-interleaved single-celled metasurface. By multiplexing four channels connecting two spin states excited onto each input of three spatial frequencies

a total of twelve channels are engineered

among which three are retroreflected channels and the residual are anomalous reflection ones. Our compound multiplexed super-reflector allows five degrees of freedom in circular polarization Jones' matrix

approaching the intrinsic upper limit of such planar metasurface. The concept has been experimentally verified by a proof-of-concept super-reflector at microwave frequency

showcasing twelve reflected beams and a high efficiency exceeding 90.6% defined as the ratio of reflected power to incidence for each channel beam. Our strategy opens a new avenue for angle multiplexing and angle-resolved metadevices toward the capacity limit of 2D planar Jones' matrix.

关键词

Keywords

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