论文标题
可切换双功能跨额：在THZ状态下，几乎完美的反射和吸收
Switchable bifunctional metasurfaces: nearly perfect retroreflection and absorption at THz regime
论文作者
论文摘要
在这里，我们利用二氧化钒（VO2）来设计以相同靶向频率工作的双功能跨表面。随着温度的升高，设计的元表面的功能可以从多通道逆转录器转换为由VO2从绝缘体到导体的相变引起的完美吸收器。与传统的双功能元整膜不同，我们提出的双功能跨表面是基于两个功能之间的相互作用。该设备具有良好的波前操纵和光吸收的可能性，因此为可切换检测和抗检测设备提供了有希望的方法。
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.
