Strong coupling of single emitters to surface plasmons
Strong coupling of single emitters to surface plasmons
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DOI：
10.1103/physrevb.76.035420
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发表时间：
2007-07-01
影响因子：
3.7
通讯作者：
Lukin, M. D.
中科院分区：
文献类型：
--
作者：
Chang, D. E.;Sorensen, A. S.;Lukin, M. D.
我们提出了一种方法，使单个光发射体和导电纳米结构中的电磁激发之间能够实现强烈的相干耦合。激发是可以局域化到亚波长维度的光学等离子激元。在现实条件下，严格的限制使得光发射几乎完全被引导到传播的等离子体激元模式，其机制类似于腔量子电动力学。我们首先以纳米线为例说明这一结果，然后再考虑纳米尖端的优化几何形状。我们描述了这种技术的一种应用，包括按需高效地产生单光子，其中等离子体被有效地外耦合到介质波导。最后，我们分析了表面粗糙引起的散射增加对这些纳米结构的影响。
We propose a method that enables strong, coherent coupling between individual optical emitters and electromagnetic excitations in conducting nanostructures. The excitations are optical plasmons that can be localized to subwavelength dimensions. Under realistic conditions, the tight confinement causes optical emission to be almost entirely directed into the propagating plasmon modes via a mechanism analogous to cavity quantum electrodynamics. We first illustrate this result for the case of a nanowire, before considering the optimized geometry of a nanotip. We describe an application of this technique involving efficient single-photon generation on demand, in which the plasmons are efficiently outcoupled to a dielectric waveguide. Finally, we analyze the effects of increased scattering due to surface roughness on these nanostructures.