[17a-A32-1~11] 3.1 Basic optics and frontier of optics

9:15 AM - 9:30 AM JST(12:15 AM - 12:30 AM UTC)

[17a-A32-2] Chiral Optical Force and Chirality Enhancement under Kerker Condition in the Mie-resonant Metasurface which Induces Chiral Asymmetry in Crystallization

〇HIROMASA NIINOMI¹, Kazuhiro Gotoh^2,3, Naoki Takano¹, Miho Tagawa⁴, Iori Morita⁵, Akiko Onuma¹, Hiroshi Yoshikawa⁶, Ryuzo Kawamura⁷, Tomoya Oshikiri^1,8, Masaru Nakagawa¹ (1.IMRAM, Tohoku Univ., 2.Grad. Sch. Sci. Tech., Niigata Univ., 3.IRCNT, Niigata Univ., 4.IMaSS, Nagoya Univ., 5.RIEC, Tohoku Univ., 6.Grad. Sch. Eng., Osaka Univ., 7.Grad. Sch. Sci. Eng., Saitama Univ., 8.RIES, Hokkaido Univ.)

Keywords:

Mie resonance,Kerker condition,Chiral crystallization

This presentation shows electromagnetic field analyses of the Mie-resonant silicon (Si) nanodisk metasurface that induces chiral asymmetry in the chiral crystallization of sodium chlorate (NaClO₃) from a solution, assuming that the surrounding medium is the solution to reproduce the crystallization experiments. The analyses suggested the occurrence of directional forward scattering, which implies that the system was under kerker condition, from the Si nanodisks. The analyses also suggested that the optical chirality enhancement was broader and stronger than that under non-Kerker conditions with handedness preservation of the incident circularly polarized light for the excitation of Mie resonance. In addition, we discuss the influence of the chiral optical force caused by the spatial gradient of optical chirality on the chiral nucleation of NaClO₃.