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增益介质中金属纳米颗粒的等离子体激元奇点

已有 3362 次阅读 2011-12-16 13:30 |个人分类:Plasmonics|系统分类:论文交流| 金属纳米颗粒, 局域等离子体共振, 增益阈值, 等离子体激元奇点

Plasmon Singularities from Metal Nanoparticles in Active Media: Influence of Particle Shape on the Gain Threshold
DOI: 10.1007/s11468-011-9313-5
Abstract
Localized surface plasmon singularities from metal nanoparticles in active media are investigated on the basis of classic linear electrodynamics. It is found that the gain threshold is inversely proportional to the shape factor of the particle. When relating this phenomenon to the plasmonic field-enhanced emission from gain units, we show that the maximum electric field around spheroidal particles impacts upon the gain threshold via a two-exponential decay function. Our results provide a way to reduce the gain requirement in metal nanoparticle-based spaser or random laser systems.

全文链接:http://www.springerlink.com/content/702819m847168436/


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