A graphene-sandwich metasurface for electrically controlled operation as a frequency shifter, a reciprocal switch, and a bidirectional isolator in the terahertz spectral regime was simulated using CST Microwave Studio™ 2019 software. The metasurface is a biperiodic array of identical meta-atoms, each of which comprises a silicon layer with a graphene patch on each of its two faces. The polarization-insensitive metasurface has ∼15 dB isolation loss as well as ∼15 dB extinction ratio and can be controlled to function over a wide frequency range.

中文翻译：

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石墨烯-夹层超表面作为太赫兹频率的移频器，开关和隔离器

使用CST Microwave Studio™2019软件模拟了在太赫兹频谱范围内作为移频器，往复开关和双向隔离器进行电控操作的石墨烯-夹层超表面。所述超表面是相同的超原子的双周期阵列，每个超原子包括在其两个面上都带有石墨烯贴片的硅层。对极化不敏感的超颖表面具有约15 dB的隔离损耗以及约15 dB的消光比，可以对其进行控制以在较宽的频率范围内发挥作用。