摘要
测量了棱镜／ＬＢ膜／银膜／空气、棱镜／银膜／银膜／空气、棱镜／银膜／空气三种结构在衰减全反射条件下激发的表面等离子激元波由于银膜－空气界面粗糙度而散射到空气中的辐射效率。同时，由散射光强分布计算出表面粗糙度参数即横向相关长度σ和表面波纹深度δ，再由σ和δ计算出理论辐射效率，理论与实验结果相符合。
The attenuated total reflection technique was used to excite surface plasmon. We have measured the efficiencies of the surface plasmon energy emitted through surface roughness into air side, for prism/LB film or Ag film /Ag film/ air and prism/Ag film/air structures. Depending on the distribution of scattering light intensity, the surface roughness parameters, i. e. the transverse correlation length σ and the surface corrugation depth δ of air/Ag film interface were simultaneously evaluated. Then we calculated the emission efficiency of the surface plasmon polariton energy from σ and δ. The calculated efficiency corresponds with that of experiment.
出处
《光学学报》
EI
CAS
CSCD
北大核心
1998年第11期1556-1561,共6页
Acta Optica Sinica
基金
国家自然科学基金
关键词
等离子激元波
辐射效率
光波导器件
薄膜
surface plasmon waves, emission efficiency, stochastic roughness parameters.
