Surface enhanced circular dichroism spectroscopy mediated by non-chiral nanoantennas
Abstract
We theoretically investigate light matter interactions for chiral molecules in the presence of non-chiral nanoantennas. Isotropic nanostructures supporting optical-frequency electric or magnetic dipoles are sufficient to locally enhance the excitation of a molecule's chiral polarizability and thus its circular dichroism spectrum. However, simultaneous electric and magnetic dipoles are necessary to achieve a net, spatially-averaged enhancement. Our contribution provides a theoretical framework to understand chiral light-matter interactions at the nanoscale and sets the necessary and sufficient conditions to enhance circular dichroism spectroscopy in the presence of nanoantennas. The results may lead to new, field-enhanced, chiral spectroscopic techniques.
Keywords
Cite
@article{arxiv.1209.0288,
title = {Surface enhanced circular dichroism spectroscopy mediated by non-chiral nanoantennas},
author = {Aitzol Garcia-Etxarri and Jennifer A. Dionne},
journal= {arXiv preprint arXiv:1209.0288},
year = {2013}
}
Comments
12 pages, 2 figures