Quantum Control of Graphene Plasmon Excitation and Propagation at Heaviside Potential Steps,Nano Letters

当前位置： X-MOL 学术 › Nano Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Quantum Control of Graphene Plasmon Excitation and Propagation at Heaviside Potential Steps
Nano Letters ( IF 9.6 ) Pub Date : 2018-01-19 00:00:00 , DOI: 10.1021/acs.nanolett.7b05085
Dongli Wang _{1,

2} , Xiaodong Fan _{1,

2} , Xiaoguang Li ₃ , Siyuan Dai ₄ , Laiming Wei _{1,

2} , Wei Qin ₁ , Fei Wu _{1,

2} , Huayang Zhang _{1,

2} , Zeming Qi ₅ , Changgan Zeng _{1,

2} , Zhenyu Zhang ₁ , Jianguo Hou ₁

Affiliation

Quantum mechanical effects of single particles can affect the collective plasmon behaviors substantially. In this work, the quantum control of plasmon excitation and propagation in graphene is demonstrated by adopting the variable quantum transmission of carriers at Heaviside potential steps as a tuning knob. First, the plasmon reflection is revealed to be tunable within a broad range by varying the ratio γ between the carrier energy and potential height, which originates from the quantum mechanical effect of carrier propagation at potential steps. Moreover, the plasmon excitation by free-space photos can be regulated from fully suppressed to fully launched in graphene potential wells also through adjusting γ, which defines the degrees of the carrier confinement in the potential wells. These discovered quantum plasmon effects offer a unified quantum-mechanical solution toward ultimate control of both plasmon launching and propagating, which are indispensable processes in building plasmon circuitry.

中文翻译：

石墨烯等离子体激元和重质势步增长的量子控制。

单个粒子的量子力学效应会极大地影响集体等离激元的行为。在这项工作中，通过采用载流子在Heaviside电位阶跃处的可变量子传输作为调节旋钮，证明了石墨烯中等离激元激发和传播的量子控制。首先，通过改变载流子能量与势能高度之间的比值γ，揭示了等离激元反射在很宽的范围内是可调的，这是由载流子在势能步长处传播的量子力学效应引起的。此外，通过调整γ，可以将自由空间照片激发的等离激元激发从石墨烯势阱中的完全抑制调节为完全发射，这可以定义载流子在势阱中的局限程度。

更新日期：2018-01-19

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11