TM模场入射到金属光栅的表面增强喇曼散射计算分析  

Analysis of Surface-enhanced Raman Scattering for Incoming Light of TM Model on a Silver Raster

作　　者：胡国进[1] 胡秀霞[2] 聂义友[3] 

机构地区：[1]江西教育学院,南昌330029 [2]江西农业大学,南昌330046 [3]江西师范大学物理与通信电子学院

出　　处：《光子学报》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

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.

关 键 词：喇曼光谱 表面增强喇曼散射 矩形光栅 耦合波 

分 类 号：O657.3[理学—分析化学]