【24h】

Plasmons of hot-carrier graphene

机译:热载石墨烯等离子

获取原文

摘要

Graphene, as a 2D semi-metal, is able to support surface plasmon modes. These plasmons interact, scattering the electrons in graphene, by way of emission and absorption. For electrons in thermal equilibrium, the energy scale of the optical response can be tuned by setting the Fermi level via external gate voltage. However, for non-equilibrium cases, such as photo-excitation, plasmons can become amplified through stimulated emission. We present how the non-local sheet conductivity can be calculated for graphene in non-equilibrium cases, how this affects the plasmon dispersion, as well as absorption and emission rates, and how the plasmon channel contributes to carrier relaxtion.
机译:石墨烯作为2D半金属,能够支持表面等离振子模式。这些等离子体激元相互作用,通过发射和吸收将电子散射到石墨烯中。对于处于热平衡状态的电子,可以通过外部栅极电压设置费米能级来调整光学响应的​​能级。但是,对于非平衡情况,例如光激发,等离子体激元可通过受激发射而被放大。我们介绍了如何在非平衡情况下为石墨烯计算非局部薄层电导率,这如何影响等离子体扩散,吸收和发射速率,以及等离子体通道如何促进载流子弛豫。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号