Role of nonlocality and Landau damping in the dynamics of a quantum dot coupled to surface plasmons
Role of nonlocality and Landau damping in the dynamics of a quantum dot coupled to surface plasmons
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DOI：
10.1103/physrevb.93.195414
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发表时间：
2016-05
影响因子：
3.7
通讯作者：
A. Vagov;I. Larkin;Mihail D. Croitoru;V. M. Axt
中科院分区：
文献类型：
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作者：
A. Vagov;I. Larkin;Mihail D. Croitoru;V. M. Axt
Weinvestigatethedynamicsofaquantumemitter(quantumdot)placedinthevicinityofaflatmetalsurface.The动力学是由发射区和表面等离子体激元之间的耦合引起的。等离子体激元-极化子模在金属的非局域Lindhard型介电响应的连续介质模型中被描述。在旋波近似下得到了动力学方程的解析解。结果表明，电磁响应的非定域性和金属中的朗道阻尼对fl有相当大的影响。特别是，弛豫动力学的特征是两个不同的时间，由于响应的非局部性，这两个时间可能会有很大的不同。结果还表明，其中一个对弛豫的贡献可以具有一条幂函数长时间渐近线，从而导致动力学模式的显著变化。DOI：10.1103/PhysRevB.93.195414
Weinvestigatethedynamicsofaquantumemitter(quantumdot)placedinthevicinityofaflatmetalsurface.The dynamics is induced by the coupling between the emitter and surface plasmon-polaritons. The plasmon-polariton modes are described within a continuous media model with a nonlocal Lindhard-type dielectric response of the metal. The analytic solution of the dynamical equations is obtained in the rotating wave approximation. The results demonstrate a considerable influence of the nonlocality of the electromagnetic response and the Landau damping in the metal. In particular, the relaxation dynamics is characterized by two distinct times that may differ by large amounts as a consequence of the nonlocality of the response. It is also shown that one of the contributions to the relaxation can have a power-law long-time asymptote, leading to notable changes in the dynamical pattern. DOI: 10.1103/PhysRevB.93.195414