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CDDA: extension and analysis of the discrete dipole approximation for chiral systems

Abstract: Discrete dipole approximation (DDA) is a computational method broadly used to solve light scattering problems. In this work, we propose an extension of DDA that we call Chiral-DDA (CDDA), to study light-chiral matter interactions with the capability of describing the underlying physics behind. Here, CDDA is used to solve and analyze the interaction of a nanoantenna (either metallic or dielectric) with a chiral molecule located in its near field at different positions. Our method allowed to relate near field interactions with far field spectral response of the system, elucidating the role that the nanoantenna electric and magnetic polarizabilities play in the coupling with a chiral molecule. In general, this is not straightforward with other methods. We believe that CDDA has the potential to help researchers revealing some of the still unclear mechanisms responsible for the chiral signal enhancements induced by nanoantennas.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Optics Express, 2021, 29 (19), 30020 - 30034

Editorial: The Optical Society (OSA)

 Fecha de publicación: 01/09/2021

Nº de páginas: 15

Tipo de publicación: Artículo de Revista

 DOI: 10.1364/OE.434061

ISSN: 1094-4087

Proyecto español: PGC2018-096649-B-I

Url de la publicación: https://doi.org/10.1364/OE.434061