Polarization Dependence of Surface Enhanced Raman Scattering on a Single Dielectric Nanowire
Abstract
Our measurements of surface enhanced Raman scattering (SERS) on Ga2O3dielectric nanowires (NWs) core/silver composites indicate that the SERS enhancement is highly dependent on the polarization direction of the incident laser light. The polarization dependence of the SERS signal with respect to the direction of a single NW was studied by changing the incident light angle. Further investigations demonstrate that the SERS intensity is not only dependent on the direction and wavelength of the incident light, but also on the species of the SERS active molecule. The largest signals were observed on an NW when the incident 514.5 nm light was polarized perpendicular to the length of the NW, while the opposite phenomenon was observed at the wavelength of 785 nm. Our theoretical simulations of the polarization dependence at 514.5 nm and 785 nm are in good agreement with the experimental results.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 01, 2012
- Source ID
- 10.1155/2012/946868
Entities
People
- Hua Qi
- O. J. Glembocki
- R. W. Rendell
- Sharka M. Prokes
Organizations
- Office of Naval Research
- United States Naval Research Laboratory