Terahertz-Band Study on Surface Enhanced Raman Scattering of Nanoparticle
WU Yu-deng1, REN Guang-jun1*, HAO Yun2, YAO Jian-quan3
1. School of Electronics Information Engineering, Tianjin Key Lab of Film Electronic & Communication Devices, Engineering Research Center of Communication Devices and Technology, Ministry of Education, Tianjin University of Technology, Tianjin 300384, China 2. Zhonghuan Information College, Tianjin University of Technology, Tianjin 300380, China 3. College of Precision Instrument and Optoelectronics Engineering, Institute of Laser and Optoelectronics, Key Laboratory of Optoelectric Information Science and Technology, Ministry of Education, Tianjin University, Tianjin 300072, China
Abstract：Study on surface-enhanced Raman scattering in the terahertz-band proved in that the terahertz-band Raman enhancement 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 irradiated 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.
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