Affiliation:
1. Nankai University
2. Science and Technology on Electro-Optical Information Security Control Laboratory
3. Shanghai Normal University
Abstract
Achieving high-quality (Q)-factor resonances in metasurfaces is essential for various applications, including nano-lasers, nonlinear optics, and quantum optics. In this work, we propose a high-Q metasurface using a topological strategy: constructing the metasurface by stacking two conjugated nanopillar arrays with different topological invariants. Our study shows that a topological edge state steadily appears at the interfaces of the nanopillars, and a sharp transmission resonance with a Q-factor of more than 1000 can be obtained. The sensing application of such high-Q topological metasurface is also demonstrated, whose figure of merit reaches approximately 145. The proposed strategy and underlying theory can open up new avenues to realize ultrasharp resonances, which can promote numerous potential applications, such as biosensing, optical modulation, and slow-light devices.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Guangdong Major Project of Basic and Applied Basic Research
111 Project
Program for Changjiang Scholars and Innovative Research Team
Fundamental Research Funds for the Central Universities
Tianjin Youth Talent Support Program
Subject
Atomic and Molecular Physics, and Optics
Cited by
5 articles.
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