Polarization characteristics of surface-enhanced Raman scattering from a small number of molecules at the gap of a metal nano-dimer.

Polarized SERS was measured at the substrate with an Ag nano-dimer array immersed in 4,4'-bipyridine solution. The orientation of the molecule at the gap of the dimer changed the polarization of the scattering photons. © The Royal Society of Chemistry 2011