首页|Enhancing the Goos-H?nchen shift based on quasi-bound states in the continuum through material asymmetric dielectric compound gratings

Enhancing the Goos-H?nchen shift based on quasi-bound states in the continuum through material asymmetric dielectric compound gratings

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Quasi-bound state in the continuum(QBIC)resonance is gradually attracting attention and being applied in Goos-Hänchen(GH)shift enhancement due to its high quality(Q)factor and superior optical confinement.Currently,symmetry-protected QBIC resonance is often achieved by breaking the geometric symmetry,but few cases are achieved by breaking the material symmetry.This paper proposes a dielectric compound grating to achieve a high Q factor and high-reflection symmetry-protectede QBIC resonance based on material asymmetry.Theoretical calculations show that the symmetry-protected QBIC resonance achieved by material asymmetry can significantly increase the GH shift up to-980 times the resonance wavelength,and the maximum GH shift is located at the reflection peak with unity reflectance.This paper pro-vides a theoretical basis for designing and fabricating high-performance GH shift tunable metasurfaces/dielectric gratings in the future.

bound state in the continuumGoos-Hänchen shiftdielectric compound gratingmaterial asym-metry

江孝伟、方彬、占春连

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College of Optical and Electronic Technology,China Jiliang University,Hangzhou 310018,China

College of Information Engineering,Quzhou College of Technology,Quzhou 324000,China

浙江省自然科学基金国家自然科学基金Public Welfare Technology Research Project of Zhejiang ProvinceQuzhou Science and Technology Project of China

LQ23F04000112204446LGC22E0500062022K104

2024

10.1088/1674-1056/acf661

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(3)
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