Ultrasensitive terahertz sensing with high-Q toroidal dipole resonance governed by bound states in the continuum in all-dielectric metasurface

Toroidal dipole (TD) with weak coupling to the electromagnetic fields offers tremendous potential for advanced design of photonic devices. However, the excitation of high quality (Q) factor TD resonances in these devices is challenging. Here, we investigate ultrahigh-Q factor TD resonances at terahe...

Full description

Bibliographic Details
Main Authors: Wang Yulin, Han Zhanghua, Du Yong, Qin Jianyuan
Format: Article
Language:English
Published: De Gruyter 2021-01-01
Series:Nanophotonics
Subjects:
Online Access:https://doi.org/10.1515/nanoph-2020-0582