Switchable bifunctional metasurfaces: nearly perfect retroreflection and absorption at THz regime
Abstract
Here we make use of vanadium dioxide (VO2) to design a bifunctional metasurface working at the same targeted frequency. With the increase of temperature, the functionality of the designed metasurface can switch from a multi-channel retroreflector to a perfect absorber, caused by the phase transition of VO2 from insulator to conductor. Different from traditional bifunctional metasurfaces designed by simple composition of two functionalities, our proposed bifunctional metasurface is based on the interaction between two functionalities. The device shows good potential for the combination of wavefront manipulation and optical absorption, therefore providing a promising approach for switchable detection and anti-detection devices.
Keywords
Cite
@article{arxiv.2006.10229,
title = {Switchable bifunctional metasurfaces: nearly perfect retroreflection and absorption at THz regime},
author = {Shan Zhu and Yanyan Cao and Yangyang Fu and Xiaochao Li and Lei Gao and Huanyang Chen and Yadong Xu},
journal= {arXiv preprint arXiv:2006.10229},
year = {2020}
}
Comments
Accepted by Optics Letters