[19p-A33-1~18] 3.11 Nanoscale optical science and near-field optics

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)

[19p-A33-3] 【Absence】Control of electric and magnetic dipole emission by toroidal dipole resonance of silicon metasurface

〇Daiki Yabuguchi¹, Keisuke Moriasa¹, Hiroshi Sugimoto¹, Fujii Minoru¹ (1.Kobe Univ.)

Keywords:

emission control,toroidal dipole mode,magnetic dipole transition

Two-dimensional arrays of silicon nanodiscs with an aspect ratio of 5 or higher show electromagnetic field enhancement originating from toroidal dipole (TD) resonance. In this study, the near-infrared emission (1.5 μm) of erbium ions (Er³⁺), whose contributions to the ED and MD transitions are nearly equal, is used as a probe to investigate the effect of TD resonance of silicon nanodisk arrays on the emission efficiency and directivity of each transition, both computationally and experimentally.