Abstract

Exceptional point (EP) is a special degeneracy of non-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 ( | r−1 | >0.999) and absorb the incident light from the right side ( | r+1 | < 10–4). 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.

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 lightwaves.

Details

Title
Scattering exceptional point in the visible
Author
He, Tao 1 ; Zhang, Zhanyi 2 ; Zhu, Jingyuan 2 ; Shi, Yuzhi 2 ; Li, Zhipeng 3 ; Wei, Heng 3 ; Wei, Zeyong 4 ; Li, Yong 5   VIAFID ORCID Logo  ; Wang, Zhanshan 2 ; Qiu, Cheng-Wei 3   VIAFID ORCID Logo  ; Cheng, Xinbin 4   VIAFID ORCID Logo 

1  MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai, China; Tongji University, Institute of Precision Optical Engineering, School of Physics Science and Engineering, Shanghai, China (GRID:grid.24516.34) (ISNI:0000 0001 2370 4535); Tongji University, Shanghai Institute of Intelligent Science and Technology, Shanghai, China (GRID:grid.24516.34) (ISNI:0000 0001 2370 4535); Shanghai Frontiers Science Center of Digital Optics, Shanghai, China (GRID:grid.24516.34); Shanghai Professional Technical Service Platform for Full-Spectrum and High-Performance Optical Thin Film Devices and Applications, Shanghai, China (GRID:grid.24516.34); Tongji University, Department of Electronic Science and Technology, Shanghai, China (GRID:grid.24516.34) (ISNI:0000 0001 2370 4535) 
2  MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai, China (GRID:grid.24516.34); Tongji University, Institute of Precision Optical Engineering, School of Physics Science and Engineering, Shanghai, China (GRID:grid.24516.34) (ISNI:0000 0001 2370 4535); Tongji University, Shanghai Institute of Intelligent Science and Technology, Shanghai, China (GRID:grid.24516.34) (ISNI:0000 0001 2370 4535); Shanghai Frontiers Science Center of Digital Optics, Shanghai, China (GRID:grid.24516.34); Shanghai Professional Technical Service Platform for Full-Spectrum and High-Performance Optical Thin Film Devices and Applications, Shanghai, China (GRID:grid.24516.34) 
3  National University of Singapore, Department of Electrical and Computer Engineering, Singapore, Singapore (GRID:grid.4280.e) (ISNI:0000 0001 2180 6431) 
4  MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai, China (GRID:grid.4280.e); Tongji University, Institute of Precision Optical Engineering, School of Physics Science and Engineering, Shanghai, China (GRID:grid.24516.34) (ISNI:0000 0001 2370 4535); Tongji University, Shanghai Institute of Intelligent Science and Technology, Shanghai, China (GRID:grid.24516.34) (ISNI:0000 0001 2370 4535); Shanghai Frontiers Science Center of Digital Optics, Shanghai, China (GRID:grid.24516.34); Shanghai Professional Technical Service Platform for Full-Spectrum and High-Performance Optical Thin Film Devices and Applications, Shanghai, China (GRID:grid.24516.34) 
5  Tongji University, Institute of Acoustics, School of Physics Science and Engineering, Shanghai, China (GRID:grid.24516.34) (ISNI:0000000123704535) 
Pages
229
Publication year
2023
Publication date
2023
Publisher
Springer Nature B.V.
e-ISSN
20477538
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41377-023-01282-4
ProQuest document ID
2865139937
Copyright
© The Author(s) 2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.