[16p-B12-1~10] 3.12 Nanoscale optical science and near-field optics

[16p-B12-2] Strong coupling between dye molecules and plasmon on one dimensional SERS hotspots of single silver nanowire dimers

〇Tamitake Itoh¹, Yuko Yamamoto S^2,3, Yasutaka Kitahama⁴, Jeyadevan Balachandran⁵ (1.AIST, 2.JSPS RPD, 3.Kagawa Univ., 4.Kwansei Gakuin Univ., 5.Univ. Shiga Pref.)

Keywords:plasmon, nanowire, strong coupling

Plasmonic nanoparticle dimer gaps, which distance is below 1 nm, are called hotspots where molecules and plasmon strongly interact to each other, resulting in enhancement of molecular optical responses. The gaps also realize strong coupling systems. Recently, such systems have been extensively studied in Quantum electrodynamics fields. In the case of nanowire dimers, coupling systems are expected to be extended to 10 mm (by 10⁴ times). We demonstrated the extended coupling systems by comparing plasmon resonance changes before and after SERS quenching.