[10a-E201-1~11] 3.11 Nanoscale optical science and near-field optics

10:45 AM - 11:00 AM JST(1:45 AM - 2:00 AM UTC)

[10a-E201-7] Polarization properties of circular-polarization-dependent SHG from vertically arranged chiral Au nanoparticle dimers

〇Kohei Iijima¹, Masayoshi Kamiya¹, Atsushi Sugita¹ (1.Shizuoka Univ.)

Keywords:

Chiral Plasmonics,Nonlinear optics,Polarization properties

In this presentation, we report the polarization behavior of SHG signals from vertically arranged chiral Au nanoparticle dimers. The generated SHG signal is nearly linearly polarized irrespective of the handedness of the circularly polarized pump light, whereas its polarization direction is dependent strongly on the pump handedness. FDTD simulations suggested that right- and left-handed circularly polarized excitation selectively enhanced the optical fields around different nanoparticles in the dimer. The polarization characteristics of the SHG emitted from the selectively excited nanoparticle therefore determine the far-field SHG polarization from the entire dimer structure.