[9a-PA4-1~34] 3.11 Nanoscale optical science and near-field optics

[9a-PA4-24] Nanostructure–Chiral Matter Interactions Analysis with Electromagnetic Coupling Coefficients

〇(D)HIROKI KASAI¹, Mojtaba Karimi Habil¹, Hiroshi Sugimoto¹, Minoru Fujii¹ (1.Kobe Univ)

Keywords:

chirality,Mie resonance,Helicity

Chirality transfer has attracted considerable attention as a highly sensitive method for detecting trace amounts of chiral molecules. In this study, we analyzed the circular dichroism (CD) of silicon core–chiral shell nanoparticles by introducing an electromagnetic coupling coefficient, c_n, in addition to the conventional electric and magnetic Mie coefficients, a_n and b_n. The results reveal that c₁ is significantly enhanced at the magnetic dipole resonance, leading to a strong CD response through its interference with other multipolar modes. Higher-order-mode-induced CD will also be discussed.