[23p-A101-1~13] 3.11 Nanoscale optical science and near-field optics (formerly 3.12)

[23p-A101-3] Remote-plasmonic enhanced Raman spectroscopy with plasmon-molecule remote coupling via column-structured silica layer

〇Takeo Minamikawa¹, Yukihiro Morimoto^2,3, Masahiro Kawasaki⁴, Mitsuo Kawasaki⁴ (1.Tokushima Univ., 2.Ushio Inc., 3.Osaka Univ., 4.Kyoto Univ.)

Keywords:Raman scattering, Plasmonic enhancement

This study investigated a new enhanced Raman scattering phenomenon, namely, remote plasmonic enhanced Raman scattering, which does not require contact between the metallic nanostructure and the analyte molecule. We constructed a silica columnar structure on a silver nanoisland structure on a slide glass. As a result, we found that a Raman enhancement of the order of 107 can be obtained even though the distance between the silver nanostructure and the measurement molecule is more than 100 nm.