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arXiv 2009.09301cond-mat.mes-hall
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具有漂移电流偏置的有源石墨烯等离子体

Active graphene plasmonics with a drift-current bias

Tiago A. Morgado, Mário G. Silveirinha

摘要:

我们从理论上证明了由碳化硅衬底上的漂移电流偏置石墨烯片形成的系统能够实现损耗补偿和等离子体激元放大。石墨烯片的主动响应植根于石墨烯等离子体激元的光泵浦,其具有由流动载流子提供的增益。所提出的系统作为一个光学放大器的等离子体与漂移电子共同传播和作为一个强衰减器的对等离子体。此外,我们表明,通过连接系统的输入和输出,例如,因为环形石墨烯-碳化硅纳米谐振器与漂移电子所提供的光学增益相结合,可能导致Spasing。

英文摘要:

We theoretically demonstrate that a system formed by a drift-current biased graphene sheet on a silicon carbide substrate enables loss compensation and plasmon amplification. The active response of the graphene sheet is rooted in the optical pumping of the graphene plasmons with the gain provided by the streaming current carriers. The proposed system behaves as an optical amplifier for the plasmons co-propagating with the drifting electrons and as a strong attenuator for the counter-propagating plasmons. Furthermore, we show that the feedback obtained by connecting the input and output of the system, e.g., as a ring-shaped graphene - silicon carbide nanoresonator, combined with the optical gain provided by the drifting electrons, may lead to spasing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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