Non-Hermitian metasurface with non-trivial topology
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
The synergy between topology and non-Hermiticity in photonics holds immense potential for next-generation optical devices that are robust against defects. However, most demonstrations of non-Hermitian and topological photonics have been limited to super-wavelength scales due to increased radiative losses at the deep-subwavelength scale. By carefully designing radiative losses at the nanoscale, we demonstrate a non-Hermitian plasmonic–dielectric metasurface in the visible with non-trivial topology. The metasurface is based on a fourth order passive parity-time symmetric system. The designed device exhibits an exceptional concentric ring in its momentum space and is described by a Hamiltonian with a non-Hermitian Z 3
Description
Advisor
Degree
Type
Keywords
Citation
Yang, Frank, Prasad, Ciril S., Li, Weijian, et al.. "Non-Hermitian metasurface with non-trivial topology." Nanophotonics, 11, no. 6 (2022) De Gruyter: 1159-1165. https://doi.org/10.1515/nanoph-2021-0731.