太赫兹波段纳米颗粒表面增强拉曼散射的研究  

Terahertz-Band Study on Surface Enhanced Raman Scattering of Nanoparticle

作　　者：吴玉登[1] 任广军[1] 郝芸[2] 姚建铨[3] 

机构地区：[1]天津理工大学电子信息工程学院,薄膜电子与通信器件天津市重点实验室,通信器件与技术教育部工程研究中心,天津300384 [2]天津理工大学中环信息学院,天津300380 [3]天津大学精密仪器与光电子工程学院,激光与光电子研究所,光电信息科学技术教育部重点实验室,天津300072

出　　处：《光谱学与光谱分析》2013年第5期1230-1233,共4页Spectroscopy and Spectral Analysis

基　　金：国家博士后基金项目(20090460691);国家(973计划)项目(2010CB327801)资助

摘　　要：研究了太赫兹波段纳米颗粒的表面增强拉曼散射,证明在太赫兹波段同样存在拉曼增强现象。通过研究表面增强拉曼散射的电磁增强原理,提出利用时域有限差分法仿真模拟纳米颗粒在太赫兹波照射下的表面增强拉曼散射,分析了太赫兹波的增强效果。仿真实验表明,时域有限差分法可以有效精确仿真太赫兹波段纳米颗粒的散射效果,结果使表面增强拉曼散射从可见光和红外波段扩展到太赫兹波段,为太赫兹波与表面增强拉曼散射的结合应用提供了依据。Study on surface-enhanced Raman scattering in the terahertz-band proved in that the terahertz-band Raman enhance- ment also exists. By studing principles of electromagnetic enhancement of surface-enhanced Raman scattering, using the finite- difference time-domain method, the electromagnetic enhancement of surface enhanced Raman scattering of nano-particles irradia- ted by terahertz-wave was simulated, and the enhancement effect of terahertz waves was analyzed. Simulation experiments show that using finite-difference time-domain method could obtain effectively accurate simulation result of nano-particle scattering, proving that for terahertz waves.surface-enhanced effects on the surface of the nano-particle also exist. The results for surface- enhanced Raman scattering extended from the visible and infrared to terahertz-band, and provide a basis for application of the combination of surface-enhanced Raman scattering and terahertz-wave.

关 键 词：太赫兹 表面增强拉曼散射 时域有限差分法 纳米颗粒 

分 类 号：O657.3[理学—分析化学]