[21p-224A-1~13] 3.12 Nanoscale optical science and near-field optics

[21p-224A-2] Femtosecond time-resolved absorption spectroscopy of Au nanodisks systems

〇Shohei Hamada¹, Hirofumi Yogo¹, Hiroumi Matsui², Atsushi Ono¹, Wataru Inami¹, Yoshimasa Kawata¹, Masayuki Yoshizawa², Atsushi Sugita¹ (1.Shizuoka Univ., 2.Tohoku Univ.)

Keywords:plasmonics

Femtosecond pump-probe spectroscopy was performed for Au nanodisks at surface plasmon. The transient absorptions with 220fs delay time was observed, which was attributed to the redistribution of non-thermally equilibrated hot electrons to thermally equilibrated Bolzman distributions.We will also report the polarization dependencies of the transient absorption , and anisotropic response of the plasmon polarizations will be discussed.