摘要
以纳米量级金属履带矩形光栅为模型,研究了表面增强喇曼散射的特性.针对TM模的入射光,采用严格的耦合波原理对金属表面的衍射场进行了分析,并用数值计算方法讨论了光栅深度、光栅占空比等参量对金属表面增强的影响以及增强因子随光栅深度的变化关系.结果显示:当入射光波长为700nm、入射角度为10°、光栅周期p=600nm、光栅深度d=37.5nm、占空比为1/3时,获得最大增强,增强因子G达104倍.
The features of SERS is studied by taking the nanometer grade silver tract rectangular raster as a model. For incoming light of TM mode, the strict-coupling wave principle is adopted to calculate the metal surface diffraction field. The influence on surface enhancement by the raster cycle, depth, space-occupying rate, wavelength and angle of incoming light is discussed. The results show that the enhanced factor G may achieve 10° order for an incoming light with wavelength 700 nm incident at an angle 10^0 on a raster with raster period 600 nm, raster depth 37.5 nm, and space-occupying rate 1/3.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2008年第1期152-155,共4页
Acta Photonica Sinica
基金
江西省自然科学基金
江西省教育厅科研基金
江西省光电子与通信重点实验室开放基金资助
关键词
喇曼光谱
表面增强喇曼散射
矩形光栅
耦合波
Raman spectrum
Surface-enhanced Raman scattering
Rectangular raster
Coupling wave
