Extraordinary Enhancement of Quadrupolar Transitions Using Nanostructured Graphene
Extraordinary Enhancement of Quadrupolar Transitions Using Nanostructured Graphene
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DOI：
10.1021/acsphotonics.8b00523
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发表时间：
2018-06
期刊：
影响因子：
7
通讯作者：
S. Sanders;Asher May;A. Alabastri;A. Manjavacas
中科院分区：
文献类型：
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作者：
S. Sanders;Asher May;A. Alabastri;A. Manjavacas
由金属纳米结构支撑的表面等离子体与光强烈相互作用，并将其限制在亚波长体积内，从而迫使相应的电场在纳米级的距离内变化。这导致了非常大的场梯度，可以用来增强位于纳米结构附近的量子发射体的四极跃迁。石墨烯纳米结构非常适合于这一任务，因为它们的等离子体可以将光限制在比传统等离子体纳米结构所支持的等效激发小得多的体积中。此外，除了它们的几何可调谐之外，石墨烯等离子体还可以通过控制纳米结构的掺杂水平来有效地调谐，这可以通过化学或静电来实现。在这里，我们提供了不同的石墨烯纳米结构附近的场梯度增强的详细研究。利用麦克斯韦方程的严格解，以及…
Surface plasmons supported by metallic nanostructures interact strongly with light and confine it into subwavelength volumes, thus forcing the corresponding electric field to vary within nanoscale distances. This results in exceedingly large field gradients that can be exploited to enhance the quadrupolar transitions of quantum emitters located in the vicinity of the nanostructure. Graphene nanostructures are ideally suited for this task, since their plasmons can confine light into substantially smaller volumes than equivalent excitations sustained by conventional plasmonic nanostructures. Furthermore, in addition to their geometric tunability, graphene plasmons can also be efficiently tuned by controlling the doping level of the nanostructure, which can be accomplished either chemically or electrostatically. Here, we provide a detailed investigation of the enhancement of the field gradient in the vicinity of different graphene nanostructures. Using rigorous solutions of Maxwell’s equations, as well as an...