[18p-A305-1~11] 3.11 Nanoscale optical science and near-field optics (formerly 3.12)

[18p-A305-3] Near-field spectral properties and dynamics of exciton-plasmon strong coupling systems

〇(M2)Hiroki Takeuchi¹, Keisuke Imaeda², Sou Ryuzaki², Kosei Ueno² (1.Grad. Sch. of Chem. Sci. and Eng., Hokkaido Univ., 2.Dept. Chem., Fac. Sci., Hokkaido Univ.)

Keywords:Exciton-plasmon strong coupling, Excitation spectra, Phase relaxation dynamics

Metallic nanoparticles exhibit strong electromagnetic field enhancement due to localized surface plasmon resonance. However, the phase relaxation time of plasmon is as short as several femtoseconds. To obtain a strong electromagnetic field enhancement effect, it is essential to extend the lifetime of plasmons. We are attempting to control the lifetime by utilizing the strong coupling between plasmons and excitons composed of molecular aggregates. In this study, we investigated the spectral properties and phase relaxation dynamics of the exciton-plasmon strong coupling system.