title: Electric field enhancements around the nanorod on the base layer.
abstract: Electric field (E field) distributions of the silver rod-film nanostructures are calculated by the finite difference time domain method and compared with those of the individual nanorods. For the rod-film nanostructure, the incident waves are reflected back by the base layer and the superposition of the E fields of the incident wave and the reflection wave works as the excitation for the transverse mode electron oscillations in the nanorod, which results in the much enhanced E fields around the lateral surface of the nanorod. In addition, we investigate how the structural parameters of the rod-film nanostructure affect the E fields along the nanorod. These results would be much helpful for designing larger intensity surface enhanced Raman scattering substrates.
authors.affiliation: Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, School of Physical Science and Technology, Southwest University, Chongqing 400715, China. zyzhang@swu.edu.cn
authors.forename: Zhongyue
authors.initials: Z
authors.lastname: Zhang
authors.forename: Zhidong
authors.initials: Z
authors.lastname: Zhang
authors.forename: Lijie
authors.initials: L
authors.lastname: Zhang
authors.forename: Chengzhi
authors.initials: C
authors.lastname: Huang
authors.forename: Zuhong
authors.initials: Z
authors.lastname: Xiong