Scattering exceptional point in the visible

Tao He; Zhanyi Zhang; Jingyuan Zhu; Yuzhi Shi; Zhipeng Li; Heng Wei; Zeyong Wei; Yong Li; Zhanshan Wang; Cheng-Wei Qiu; Xinbin Cheng

doi:10.1038/s41377-023-01282-4

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Scattering exceptional point in the visible

Original Articles

- Scattering exceptional point in the visible
- Light: Science & Applications Vol. 12, Issue 10, Pages: 2228-2235(2023)
- Affiliations：
  
  1.MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai 200092, China
  2.Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
  3.Shanghai Institute of Intelligent Science and Technology, Tongji University, Shanghai 200092, China
  4.Shanghai Frontiers Science Center of Digital Optics, Shanghai 200092, China
  5.Shanghai Professional Technical Service Platform for Full-Spectrum and High-Performance Optical Thin Film Devices and Applications, Shanghai 200092, China
  6.Department of Electronic Science and Technology, Tongji University, Shanghai 201804, China
  7.Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore
  8.Institute of Acoustics, School of Physics Science and Engineering, Tongji University, Shanghai 20092, China
- Author bio：
  
  Cheng-Wei Qiu (chengwei.qiu@nus.edu.sg)
  Xinbin Cheng (chengxb@tongji.edu.cn)
- Funds：
- DOI：10.1038/s41377-023-01282-4
  CLC：
- Published：31 October 2023，
  
  Published Online：15 September 2023，
  
  Received：18 May 2023，
  
  Revised：28 August 2023，
  
  Accepted：04 September 2023
- Accepted：
Scan QR Code
He, T. et al. Scattering exceptional point in the visible. Light: Science & Applications, 12, 2228-2235 (2023).
DOI：

He, T. et al. Scattering exceptional point in the visible. Light: Science & Applications, 12, 2228-2235 (2023). DOI： 10.1038/s41377-023-01282-4.

摘要

Abstract

Exceptional point (EP) is a special degeneracy of n

on-Hermitian systems. One-dimensional transmission systems operating at EPs are widely studied and applied to chiral conversion and sensing. Lately

two-dimensional systems at EPs have been exploited for their exotic scattering features

yet so far been limited to only the non-visible waveband. Here

we report a universal paradigm for achieving a high-efficiency EP in the visible by leveraging interlayer loss to accurately control the interplay between the lossy structure and scattering lightwaves. A bilayer framework is demonstrated to reflect back the incident light from the left side (|

−1

0.999) and absorb the incident light from the right side (|

–4

). As a proof of concept

a bilayer metasurface is demonstrated to reflect and absorb the incident light with experimental efficiencies of 88% and 85%

respectively

at 532 nm. Our results open the way for a new class of nanoscale devices and power up new opportunities for EP physics.

关键词

Keywords

references

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