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Graphene-based van der Waals heterostructures for emission and detection of terahertz radiation

机译:基于石墨烯的范德华异质结构用于太赫兹辐射的发射和检测

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This paper reviews recent advances in the research of graphene-based van der Waals heterostructures for emission and detection of terahertz radiation. A gated double-graphene-layer (DGL) nanocapacitor is the core shell under consideration, in which a thin tunnel barrier layer is sandwiched by outer graphene layers at both sides. The DGL can support symmetric optical and anti-symmetric acoustic coupled plasmon modes in the GLs. The latter mode can modulate the band-offset between the GL, giving rise to modulation of the inter-GL-layer resonant tunneling. This can dramatically enhance the THz gain or responsivity via plasmon-assisted inter-GL resonant tunneling.
机译:本文综述了基于石墨烯的范德华异质结构用于太赫兹辐射发射和检测的研究进展。栅极双石墨烯层(DGL)纳米电容器是正在考虑的核壳,其中薄的隧道势垒层被两侧的外部石墨烯层夹在中间。 DGL可支持GL中的对称光学和反对称声耦合等离激元模式。后一种模式可以调制GL之间的带隙,从而引起GL层间谐振隧穿的调制。通过等离激元辅助的GL间共振隧道效应,可以显着提高THz增益或响应度。

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