Active manipulation of toroidal resonance in hybrid metal-vanadium dioxide metamaterial

Results in Physics

卷:33

Chen Zhang¹  Chang Shu²  Tongqing Lin³  Yulong Ye³ 

[1] School of Technology, Harbin University, Harbin 150086, China;

[2] Corresponding author.;

关键词: Toroidal resonance;    Metamaterial;    Vanadium dioxide;    Active manipulation;   

DOI  :  

来源: DOAJ

【 摘 要 】

A switchable toroidal resonance metamaterial consisted of hybrid metal-vanadium dioxide is proposed in this paper. The excitation of toroidal resonance is demonstrated numerically and analyzed theoretically. Simulation results illustrate that toroidal dipole resonance is excited by the E-shaped metal resonators integrated with vanadium dioxide in metal state, and strengthened toroidal resonance is further verified by calculated scattered powers. In addition, its amplitude can be actively controlled by the phase transition process of vanadium dioxide in terahertz regime. To reveal the physical mechanism, theoretical fitting is carried out. The fitting results show that modulation of amplitude can be attributed to the variation of overall damping rate, which is caused by tuning conductivity of vanadium dioxide.

【 授权许可】

Unknown