Zhu Shan, Cao Yanyan, Fu Yangyang, Li Xiaochao, Gao Lei, Chen Huanyang, Xu Yadong
Opt Lett. 2020 Jul 15;45(14):3989-3992. doi: 10.1364/OL.394164.
Here we make use of vanadium dioxide () 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 multichannel retroreflector to a perfect absorber, caused by the phase transition of 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 antidetection devices.
在这里，我们利用二氧化钒（）来设计一个在相同目标频率下工作的双功能超表面。随着温度的升高，由于从绝缘体到导体的相变，所设计超表面的功能可以从多通道后向反射器切换为完美吸收体。与通过简单组合两种功能设计的传统双功能超表面不同，我们提出的双功能超表面基于两种功能之间的相互作用。该器件在波前操纵和光吸收的结合方面显示出良好的潜力，因此为可切换检测和反检测设备提供了一种有前景的方法。
