Quantum Symmetry Breaking of Exciton/Polaritons in a Metal-Nanorod Plasmonic Array.
Quantum Symmetry Breaking of Exciton/Polaritons in a Metal-Nanorod Plasmonic Array.
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金属纳米棒等离子体阵列中激子/极化子的量子对称性破缺。
DOI：
10.1021/acs.jpca.5b10726
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
A. Piryatinski
中科院分区：
文献类型：
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作者：
Svitlana Zaster;E. Bittner;A. Piryatinski
我们研究了发射体修饰银纳米棒体系中的集体超辐射行为。从等离子体振荡的德鲁德模型出发，我们得到了一个半经验哈密顿量，它描述了量子化表面等离子体模式和量子发射体之间的耦合，量子发射体可以通过操纵它们的几何形状、间距和方向来控制。此外，在k = 0附近，将最低极化子模式确定为被激子修饰的sp态，我们检查了允许极化子量子相变的条件。虽然该系统在形式上是一个一维阵列，但我们表明，在物理可访问的参数范围内，感兴趣的极化态可以在有限温度下经历量子相变以形成玻色凝聚体。
We study the collective, superradiant behavior in the system of emitter-dressed Ag nanorods. Starting from the Drude model for the plasmon oscillations, we arrive at a semiempirical Hamiltonian describing the coupling between quantized surface plasmon modes and the quantum emitters that can be controlled by manipulating their geometry, spacing, and orientation. Further, identifying the lowest polariton mode as SP-states dressed by excitons in the vicinity of k = 0, we examine conditions allowing for the polariton quantum-phase transition. Though the system is formally a 1D array, we show that the polariton states of interest can undergo a quantum-phase transition to form a Bose condensate at finite temperatures for physically accessible parameter ranges.