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arXiv 1402.4864cond-mat.mes-hall
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二能级原子向等离子体纳米粒子多极模的自发辐射

Spontaneous radiation of a two-level atom into multipole modes of a plasmonic nanoparticle

E. S. Andrianov, A. A. Pukhov, A. P. Vinogradov, A. V. Dorofeenko, A. A. Lisyansky

摘要:

我们考虑位于球形等离子体纳米粒子(NP)附近的激发二能级系统(TLS)的弛豫。TLS的跃迁频率被假定为与NP等离子体共振的凝聚点的频率一致。我们表明,TLS激发的弛豫是一个两步的过程。在初始指数衰减之后,TLS进入拉比振荡。根据TLS和NP之间的距离,TLS处于激发态的概率呈现出混沌或接近规则的振荡。在后一种情况下,TLS-NP系统的本征频率与NP多极模式之一相一致。

英文摘要:

We consider the relaxation of an excited two-level system (TLS) positioned near a spherical plasmonic nanoparticle (NP). The transition frequency of the TLS is assumed to coincide with the frequency of the condensation point of NP plasmonic resonances. We show that the relaxation of the TLS excitation is a two-step process. Following an initial exponential decay, the TLS breaks in to Rabi oscillations. Depending upon the distance between the TLS and NP, the probability of the TLS being in the excited state exhibits either chaotic or nearly regular oscillations. In the latter case, the eigenfrequency of the TLS-NP system coincides with one of NP multipole modes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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