[16a-S2_204-1~10] CS.2 3.8 テラヘルツ全般、3.11 ナノ領域光科学･近接場光学のコードシェアセッション

11:30 〜 11:45英語発表

[16a-S2_204-9] High Q Resonance by using High-Order Anapole in Hollow Cylindrical Silicon Metasurface

〇Tianhan Cai¹, Junichi Takahara^1,2 (1.GSE., Osaka Univ., 2.Photonics Center, UO)

キーワード：

metasurface

We demonstrate a dielectric metasurface consisting of hollow cylindrical silicon resonators that supports high-Q optical resonances. By tuning the resonator height, destructive interference between the toroidal dipole and magnetic quadrupole modes occurs, forming a high-order anapole state. In conventional metasurfaces, high-Q resonances are typically obtained by breaking structural symmetry, causing an ideal bound state in the continuum to collapse into a quasi-BIC. Here, a high-Q resonance is achieved without symmetry breaking, offering a distinct mechanism for high-Q metasurface engineering.