title: Hyper-Raman scattering enhanced by anisotropic dimer plasmons on artificial nanostructures.
abstract: Silver nanodimers with a small gap of a few nanometers aligned on glass substrates were used to enhance hyper-Raman scattering of crystal violet dye molecules. When localized surface plasmon of the dimer array was resonantly excited along the interparticle axis, hyper-Raman intensity was significantly enhanced. Moreover, the spectral appearance was slightly different between the two excitation polarizations, suggesting a possibility of two resonance contributions at one-photon and two-photon energies. Since the plasmonic property of dimer arrays can be controlled by the dimer geometry, the dimer arrays are expected to be well-defined substrates for surface-enhanced hyper-Raman spectroscopy.
authors: Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan. kikeda@pchem.scci.hokudai.ac.jp
authors: Katsuyoshi
authors: K
authors: Ikeda
authors: Mai
authors: M
authors: Takase
authors: Yoshitaka
authors: Y
authors: Sawai
authors: Hideki
authors: H
authors: Nabika
authors: Kei
authors: K
authors: Murakoshi
authors: Kohei
authors: K
authors: Uosaki