Advanced Computing and Simulation Laboratory (AχL), Department of Electrical and Computer Systems Engineering, Monash University , Clayton, Victoria 3800, Australia.
Department of Electronic Engineering, Shanghai Jiao Tong University , Shanghai 200240, People's Republic of China.
ACS Nano. 2017 Dec 26;11(12):12573-12582. doi: 10.1021/acsnano.7b06735. Epub 2017 Nov 2.
The inception of the plasmonic laser or spaser (surface plasmon amplification by stimulated emission of radiation) concept in 2003 provides a solution for overcoming the diffraction limit of electromagnetic waves in miniaturization of traditional lasers into the nanoscale. From then on, many spaser designs have been proposed. However, all existing designs use closed resonators. In this work, we use cavity quantum electrodynamics analysis to theoretically demonstrate that it is possible to design an electric spaser with an open resonator or a closed resonator with much weak feedback in the extreme quantum limit in an all-carbon platform. A carbon nanotube quantum dot plays the role of a gain element, and Coulomb blockade is observed. Graphene nanoribbons are used as the resonator, and surface plasmon polariton field distribution with quantum electrodynamics features can be observed. From an engineering perspective, our work makes preparations for integrating spasers into nanocircuits and/or photodynamic therapy applications.
2003 年，等离子体激光或受激辐射放大的表面等离激元（spaser）概念的出现为克服传统激光在缩小到纳米尺度时的电磁波衍射极限提供了一种解决方案。从那时起，已经提出了许多 spaser 设计。然而，所有现有的设计都使用封闭的谐振器。在这项工作中，我们使用腔量子电动力学分析理论上证明，在全碳平台中，有可能设计出具有开放谐振器的电 spaser 或具有较弱反馈的封闭谐振器，在极端量子极限下。碳纳米管量子点充当增益元件，并观察到库仑阻塞。石墨烯纳米带用作谐振器，可以观察到具有量子电动力学特征的表面等离激元极化激元场分布。从工程角度来看，我们的工作为将 spaser 集成到纳米电路和/或光动力疗法应用中做好了准备。
