Affiliation:
1. Guizhou Education University
2. Guizhou Minzu University
Abstract
A toroidal dipole is a fundamental electromagnetic excitation independent of electric and magnetic dipoles. At present, a great deal of attention has been paid to the characteristics and applications of electric toroidal dipole resonance, while investigation of magnetic toroidal dipole (MTD) resonance is limited. The dielectric metasurface provides a good platform for the excitation of MTD. In this work, we numerically study the MTD response on a silicon tetramer metasurface. The near-field distribution and multipole decomposition fully confirm that the MTD dominates the resonance mode. Also, by integrating the phase-change material
G
e
2
S
b
2
T
e
5
film onto this metasurface, the modulation properties of relative transmission, MTD far-field scattering, phase, and local electric and magnetic fields of this hybrid device are effectively studied. The maximum modulation depth of transmission reaches 88%, which is attributed to the strong resonance of MTD. Our work provides a route for the achievement of actively tunable optical nano-devices.
Funder
National Natural Science Foundation of China
Guizhou Provincial Science and Technology Projects
Natural Science Foundation of Guizhou Minzu University
Science and Technology Talent Support Project of the Department of Education in the Guizhou Province
Construction Project of Characteristic Key Laboratory in Guizhou Colleges and Universities
Key laboratory of Guizhou Minzu University
Subject
Atomic and Molecular Physics, and Optics,Statistical and Nonlinear Physics
Cited by
8 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献