A terahertz band multifunctional metamaterial transmission–absorption switching device based on vanadium dioxide
Xinmei Wang, Xiaoyong He, Chaojun Tang, Bin Shui, Zao Yi
Abstract
conductivity, the peak transmittance of the device decreases from 93.8% to 0% and the absorption increases from 1% to 99.5%. The impedance matching theory is invoked and the physical mechanism of the device is elucidated by analyzing the surface electric field of the device. By studying the absorption characteristics for different incidence and polarization angles, the device is insensitive to polarization and has good absorption performance over large incidence angles. Compared with other absorbers of terahertz metamaterials, the device structure proposed in this study has a unique design and diverse functions and can play an important role in various fields such as communications, electromagnetic stealth, sensors, and thermal emission devices.