[20p-C304-1~14] 4.1 Plasmonics and Nanophotonics

▲ [20p-C304-11] Nonlinear Optical Response Analysis of Metallic Nanostructures - A Relationship between Electron Spill-out and 3rd-order Optical Nonlinearity-

〇Takashi Takeuchi¹, Kazuhiro Yabana², Yuki Takeuchi^1,3,4, Takuo Tanaka^1,5,6 (1.RIKEN Cluster for Pioneering Research, 2.Cent. for Comp. Sci., Univ. of Tsukuba, 3.Grad. Sch. of Nat. Sci. and Tech., Okayama Univ., 4.JSPS Research Fellow, 5.RIKEN Center for Advanced Photonics, 6.Institute of Post-LED Photonics, Tokushima Univ.)

Keywords:metallic nanostructures, nonlinear optics, electron spill-out

Metallic nanostructures have attracted attention in the field of not only linear but also nonlinear optics. Very recently, it has been theoretically clarified that the electron spill-out on the surface of the nanostructures, with a sub-nm spatial scale, significantly contributes to the nonlinear optical responses. However, those previous studies have been limited to the systems that are either a 2D thin film or considerably small 3D nanostructure with a few nm size. Therefore, in our talk, we will clarify the nonlinear optical responses induced by the electron spill-outs that come from 5 to 25 nm of metallic nanostructures.