Rigorous Modal Analysis of Chiral Nanoparticles (Advanced Optical Materials 18/2023)

In article number 2300599, Z.L. Cao, J.Y. Li, S.Z. Deng, and H.J. Chen introduce a rigorous quasinormal mode (QNM) expansion approach for analyzing the interplay between geometrical chirality, far-field circular dichroism, and near-field optical chirality. The study reveals that the far-field chiroptical handedness strongly depends on the excitation direction, whereas the near-field optical chirality is governed by the corresponding QNMs.