Quantum electrodynamics description of localized surface plasmons at a metal nanosphere
Quantum electrodynamics description of localized surface plasmons at a metal nanosphere
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DOI：
10.1103/physreva.103.l041501
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发表时间：
2020-07
期刊：
影响因子：
--
通讯作者：
K. Miwa;G. Schatz
中科院分区：
文献类型：
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作者：
K. Miwa;G. Schatz
基于由电磁场、描述等离子体激元的振荡器和描述等离子体激元以外的激发的储层组成的微观模型，提出了金属纳米球中局域表面等离子体激元（LSP）的正则量子化方案.这个完全量子电动力学理论的本征模显示出一个光谱，包括辐射去极化和加宽，包括从准静态LSP模式的红移，随着颗粒尺寸的增加。这些光谱配置文件正确匹配与精确的经典电动力学（米氏理论）。本方案提供了近场和远场区域中的每个等离子体激元的电场，从而证明了其在量子等离子体激元学和纳米光学领域中的实用性。
A canonical quantization scheme for localized surface plasmons (LSPs) in a metal nanosphere is presented based on a microscopic model composed of electromagnetic fields, oscillators that describe plasmons, and a reservoir that describes excitations other than plasmons. The eigenmodes of this fully quantum electrodynamic theory show a spectrum that includes radiative depolarization and broadening, including redshifting from the quasi-static LSP modes, with increasing particle size. These spectral profiles correctly match those obtained with exact classical electrodynamics (Mie theory). The present scheme provides the electric fields per plasmon in both near- and far-field regions whereby its utility in the fields of quantum plasmonics and nano-optics is demonstrated.