Figure 14.

(a): Polarized SERS spectra of trans-1,2-bis(4-pyridyl)-ethene (BPE) on Ag nanorod substrates as a function of the incoming polarization angle measured in a backscattering geometry. (b): Polarized UV/Vis/NIR absorption spectra. Cross-section of the NR array is schematically depicted in the inset (inclination angle of the nanorods was ~ 71° with respect to the surface normal). Both diagrams show the p-polarization direction with the incident polarization almost parallel to the major long axis of the nanorods. The maximum SERS intensity was observed in the polarization direction perpendicular to the long axis of the Ag nanorods, while the UV/Vis absorbance was strongly polarized along the direction of the long axis of the NR array. Adapted with permission from [97]. Copyright 2006 American Chemical Society.