负Purcell因子对表面等离子激元增强自发辐射的影响  

Negative Purcell Factor's Influence on Spontaneous Emission Enhanced by Surface Plasmon Polaritons

作　　者：熊贵光[1] 欧阳奎[1] 张荣军[1] 

机构地区：[1]武汉大学物理科学与技术学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2009年第4期417-420,共4页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目(10704052)

摘　　要：利用金属介电函数的Drude模型以及电磁场耦合理论,计算分析了Purcell因子对表面等离子激元(surface plasmon polaritons,SPP)增强自发辐射的影响.结果表明,对于由Ag或Au金属层和电介质层构成的半导体发光二极管系统,当Purcell因子为负值时,SPP将对自发辐射发光效率产生很大的增强作用.The Purcell factor＇s influence on spontaneous emission enhanced by surface plasmon polaritons（SPP） has been calculated and analyzed in the paper. It is shown from the calculation results that the luminescence efficiency of spontaneous emission can be enhanced greatly by SPP, when the Purcell factor in the LED system is negative, which is formed by Ag or Au metallic layer and dielectric layer.

关 键 词：表面等离子激元(SPP) 自发辐射 Purcell因子 介电常数 

分 类 号：O482.3[理学—固体物理]