A Pyramid Structured Raman Scattering Probe with Secondary Localization for Sensitive Enhancement

作者：Xia Liangping; Yin Shaoyun; Gao Hongtao; Dong Xiaochun; Du Chunlei^*

来源：Journal of Computational and Theoretical Nanoscience, 2015, 12(2): 194-198.

DOI：10.1166/jctn.2015.3716

• Surface-Enhanced Raman Scattering
• Secondary Localization
• Pyramid Structure
• Nanoparticles

A sensitive surface-enhanced Raman scattering probe structure based on the enhancement of the secondary localization is proposed. The structure is constituted with a silver coated pyramid and a small silver particle at the tip. The silver film coated on the pyramid plays a role of exciting and focusing the surface plasmon wave onto the tip, where the secondary localization is excited by the silver particle and an extraordinarily enhanced electromagnetic field is obtained. The finite difference time domain (FDTD) simulation results demonstrate that the Raman enhancement factor caused by the secondary localization is 1.34 x 10(9) which is 3 orders higher than that of the primary localization structure.

• 出版日期2015-2
• 单位中国科学院光电技术研究所; 中国科学院重庆绿色智能技术研究院