Electromagnetic near-field responses of a chiral molecule on a metal surface

Hikaru Yoneji; Nobuhiko Yokoshi; Hajime Ishihara

doi:10.1117/12.2616154

27 October 2021 Electromagnetic near-field responses of a chiral molecule on a metal surface

Hikaru Yoneji, Nobuhiko Yokoshi, Hajime Ishihara

Proceedings Volume 11926, Optical Manipulation and Structured Materials Conference 2021; 119260S (2021) https://doi.org/10.1117/12.2616154
Event: SPIE Technologies and Applications of Structured Light, 2021, Online, Japan

Abstract

We developed a generalized discrete dipole approximation (DDA) method that treats both electric and magnetic polarizations simultaneously. This method allows us to incorporate electromagnetic responses of chiral materials. We investigated near-field electric and near-field magnetic fields for both the case of a single achiral molecule and the case of a single chiral one with Pasteur parameter in the vicinity of gold nanostructures. We found the effect of the single molecules to be widespread on the metal surface, when the difference in the response electromagnetic field of these structures to rightand left-handed circularly polarized light was investigated. In addition, even though the gold structure alone does not show any magnetic response to the photoelectric field, the difference in the magnetic response to circularly polarized light appears on the metal edges near the chiral molecule. This result suggests that the measurement of the near-field field reflecting the electro-magnetic effect of chiral molecules may allow us to detect a significant effect on chirality that cannot be obtained by the measurement of the near-field electric field alone.

Citation Download Citation

Hikaru Yoneji, Nobuhiko Yokoshi, and Hajime Ishihara "Electromagnetic near-field responses of a chiral molecule on a metal surface", Proc. SPIE 11926, Optical Manipulation and Structured Materials Conference 2021, 119260S (27 October 2021); https://doi.org/10.1117/12.2616154

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