首页|Dual-symmetry-perturbed all-dielectric resonant metasurfaces for high-Q perfect light absorption

Dual-symmetry-perturbed all-dielectric resonant metasurfaces for high-Q perfect light absorption

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We demonstrate a high-Q perfect light absorber based on all-dielectric doubly-resonant metasurface.Leveraging bound states in the continuum[BICs]protected by different symmetries,we manage to independently manipulate the Qfactors of the two degenerate quasi-BICs through dual-symmetry perturbations,achieving precise matching of the radiative and non-radiative Q factors for degenerate critical coupling.We achieve a narrowband light absorption with a＞600 0 factor and a＞99％absorptance at λ0=1550 nm on an asymmetric germanium metasurface with a 0.2λ0 thickness.Our work provides a new strategy for engineering multiresonant metasurfaces for narrowband light absorption and nonlinear applications.

resonant metasurfaceperfect light absorptionbound states in the continuum

葛俊洋、高一骁、徐雷、周宁、沈样

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Laboratory of Infrared Materials and Devices,Research Institute of Advanced Technologies,Ningbo University,Ningbo 315211,China

Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province,Ningbo 315211,China

Advanced Optics & Photonics Laboratory,Department of Engineering,School of Science and Technology,Nottingham Trent University,Nottingham NG11 8NS,UK

School of Physics and Optoelectronic Engineering,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China

Ningbo Institute of Oceanography,Ningbo 315832,China

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国家自然科学基金国家自然科学基金浙江省自然科学基金宁波市自然科学基金K.C.Wong Magna Foundation of Ningbo University

6210517262005236LQ21F050004202003N4102

2024

10.3788/COL202422.023602

中国光学快报(英文版)
中国光学学会 中国科学院上海光学精密机械研究所

中国光学快报(英文版)

CSTPCD
影响因子：1.305
ISSN：1671-7694
年,卷(期)：2024.22(2)
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