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

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[10a-E201-10] NLO polymer-assisted SHG from Si nanorod dimer structures

〇Takahiro Nakashima¹, Atushi Sugita¹, Masayoshi Kamiya¹ (1.Shizuoka Univ.)

Keywords:

Si nanoparticle,nonlinear optics,quasi-bound state in the continuum

This presentation reports second-harmonic generation (SHG) of a Si nanorod dimer structure coated with a nonlinear optical (NLO) polymer. We aimed to enhance the SHG at high-Q resonances associated with quasi-bound states in a continuum (qBIC) by utilizing the bulk second-order nonlinear susceptibility of the NLO polymer. The SHG intensity from the NLO polymer-coated Si nanorod dimer was approximately 250 times larger than that from the PMMA-coated reference structure. This enhancement is considered to originate from the coupling between the resonant optical fields near and between the neighboring Si nanorods and the bulk second-order nonlinear response of the NLO polymer.