Graphene-based van der Waals heterostructures for emission and detection of terahertz radiation
Graphene-based van der Waals heterostructures for emission and detection of terahertz radiation
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用于太赫兹辐射发射和检测的石墨烯基范德华异质结构
DOI：
10.1117/12.2225257
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
T. Otsuji
中科院分区：
文献类型：
--
作者：
Yoko;A.;Aida;T.;Aoki;N.;Hojo;D.;Koshimizu;M.;Ohara;S.;Seong;G.;Takami;S.;Togashi;T.;Tomai;T.;Tsukada;T.;Adschiri;T.;T. Otsuji
本文综述了近年来石墨烯基范德华异质结构在太赫兹辐射发射和探测中的研究进展。一种门控双石墨烯层（DGL）纳米电容器是所考虑的核心外壳，其薄隧道势垒层被两侧的外层石墨烯层夹在中间。DGL可以支持对称光学和反对称声学耦合等离子体模。后一种模式可以调制GL之间的带偏置，从而引起GL层间谐振隧穿的调制。这可以通过等离子体辅助gl间共振隧穿显著提高太赫兹增益或响应性。
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.