中国物理B ›› 2025, Vol. 34 ›› Issue (7): 74208-074208.doi: 10.1088/1674-1056/adcdee

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Giant-tunable bidirectional Goos-Hänchen shifts via phase change material-based metasurfaces with quasi-bound states in continuum

Jiaqing Liu(刘佳晴)1, Yue Zheng(郑悦)1, Xiao Li(李潇)2,3, Jingwen Li(李静文)2,3, Guohao Zhang(张国昊)2,3, Daxing Dong(董大兴)2,3, Dongmei Liu(刘冬梅)1, Yuwen Jia(贾玉雯)1, Yangyang Fu(伏洋洋)2,3,†, and Youwen Liu(刘友文)2,3,‡   

  1. 1 College of Science, North China University of Science and Technology, Tangshan 063210, China;
    2 College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;
    3 Key Laboratory of Aerospace Information Materials and Physics (NUAA), MIIT, Nanjing 211106, China
  • 收稿日期:2025-02-17 修回日期:2025-04-12 接受日期:2025-04-17 出版日期:2025-06-18 发布日期:2025-06-30
  • 通讯作者: Yangyang Fu, Youwen Liu E-mail:yyfu@nuaa.edu.cn;ywliu@nuaa.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 12274225), the Fundamental Research Funds for the Central Universities (Grant No. NS2023056), the Natural Science Foundation of Hebei Province, China (Grant No. B2024209014), and the Basic Scientific Research Project of Hebei Provincial Department of Education (Grant No. JJC2024059).

Giant-tunable bidirectional Goos-Hänchen shifts via phase change material-based metasurfaces with quasi-bound states in continuum

Jiaqing Liu(刘佳晴)1, Yue Zheng(郑悦)1, Xiao Li(李潇)2,3, Jingwen Li(李静文)2,3, Guohao Zhang(张国昊)2,3, Daxing Dong(董大兴)2,3, Dongmei Liu(刘冬梅)1, Yuwen Jia(贾玉雯)1, Yangyang Fu(伏洋洋)2,3,†, and Youwen Liu(刘友文)2,3,‡   

  1. 1 College of Science, North China University of Science and Technology, Tangshan 063210, China;
    2 College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;
    3 Key Laboratory of Aerospace Information Materials and Physics (NUAA), MIIT, Nanjing 211106, China
  • Received:2025-02-17 Revised:2025-04-12 Accepted:2025-04-17 Online:2025-06-18 Published:2025-06-30
  • Contact: Yangyang Fu, Youwen Liu E-mail:yyfu@nuaa.edu.cn;ywliu@nuaa.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 12274225), the Fundamental Research Funds for the Central Universities (Grant No. NS2023056), the Natural Science Foundation of Hebei Province, China (Grant No. B2024209014), and the Basic Scientific Research Project of Hebei Provincial Department of Education (Grant No. JJC2024059).

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摘要： We propose a novel approach for investigating the tunable Goos-Hänchen (GH) shift via an all-dielectric metasurface that incorporates phase change materials (PCMs). By introducing material asymmetry through the reconfigurable characteristic of PCMs while maintaining fixed geometric parameters, we can achieve tunable dual quasi-bound states in the continuum with ultrahigh quality factors (Q factors). Enabled by such tunable dual modes with significant phase changes, the PCM-based metasurface exhibits giant-tunable bidirectional GH shifts compared to conventional metasurfaces. Notably, the GH shift exhibits multidimensional tunability, including PCM-driven switching (amorphous to crystalline), incident-angle dependence (${\theta}$), and wavelength selectivity (${\lambda}$). The maximum observed shift reaches approximately 10$^{4}$ wavelengths, accompanied by a corresponding Q factor of 10$^{7}$. Our work demonstrates its potential for applications in ultrahigh-precision multifunctional devices, from biosensing to reconfigurable nanophotonic switches.

关键词: phase change materials, Goos-Hänchen shift, quasi-bound states in the continuum, tunable metasurfaces

Abstract: We propose a novel approach for investigating the tunable Goos-Hänchen (GH) shift via an all-dielectric metasurface that incorporates phase change materials (PCMs). By introducing material asymmetry through the reconfigurable characteristic of PCMs while maintaining fixed geometric parameters, we can achieve tunable dual quasi-bound states in the continuum with ultrahigh quality factors (Q factors). Enabled by such tunable dual modes with significant phase changes, the PCM-based metasurface exhibits giant-tunable bidirectional GH shifts compared to conventional metasurfaces. Notably, the GH shift exhibits multidimensional tunability, including PCM-driven switching (amorphous to crystalline), incident-angle dependence (${\theta}$), and wavelength selectivity (${\lambda}$). The maximum observed shift reaches approximately 10$^{4}$ wavelengths, accompanied by a corresponding Q factor of 10$^{7}$. Our work demonstrates its potential for applications in ultrahigh-precision multifunctional devices, from biosensing to reconfigurable nanophotonic switches.

Key words: phase change materials, Goos-Hänchen shift, quasi-bound states in the continuum, tunable metasurfaces

中图分类号:  (Optical materials)

  • 42.70.-a
42.79.Dj (Gratings) 78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)) 78.67.Pt (Multilayers; superlattices; photonic structures; metamaterials)