Yin Shengnan, Zhu Zebin, Gao Xiangfei, Wang Qing, Yuan Jing, Liu Ying, Jiang Liyong
Opt Lett. 2022 Feb 1;47(3):678-681. doi: 10.1364/OL.447740.
Recently, terahertz (THz) nonreciprocal and functionality-switchable devices have drawn much attention. Here we report a magnetic-free THz unidirectional perfect absorber as well as a functionality-switchable device between the band-pass filter and perfect absorber based on dielectric-graphene multilayers containing a VO defect layer. We provide a theoretical explanation for the nonreciprocal transmission properties. The working frequencies of these devices can be tailored by using graphene layers of different chemical potentials.
近年来，太赫兹（THz）非互易和功能可切换器件备受关注。在此，我们报道了一种无磁太赫兹单向完美吸收器以及一种基于包含VO缺陷层的介电-石墨烯多层结构的带通滤波器和完美吸收器之间的功能可切换器件。我们为非互易传输特性提供了理论解释。这些器件的工作频率可以通过使用具有不同化学势的石墨烯层来进行调整。
