Plasmonic superchiral lattice resonances in the mid-infrared
Abstract
Recent efforts in the field of surface-enhanced spectroscopies have focused on the paradigm of superchirality, entailing the engineering of the local electromagnetic fields to boost the enantiospecific interaction between light and chiral molecules. In this framework, approaches based on both metallic and dielectric nanostructures have been proposed and have also recently been extended to vibrational circular dichroism in the mid-infrared. In this work, we design, fabricate and characterize arrays of chiral plasmonic slits featuring enhanced chiral fields in the mid-infrared. We exploit collective lattice resonances to further enhance the local intensity and to generate sharp features in the circular dichroism spectra of the platform. Such features are ideally suited to test the superchiral coupling with the vibrational resonances of chiral molecules.
Keywords
Cite
@article{arxiv.1907.03586,
title = {Plasmonic superchiral lattice resonances in the mid-infrared},
author = {Francesco Mattioli and Giuseppe Mazzeo and Giovanna Longhi and Sergio Abbate and Giovanni Pellegrini and Michele Celebrano and Marco Finazzi and Lamberto Duò and Chiara Zanchi and Matteo Tommasini and Marialilia Pea and Sara Cibella and Filippo Sciortino and Leonetta Baldassarre and Alessandro Nucara and Michele Ortolani and Paolo Biagioni},
journal= {arXiv preprint arXiv:1907.03586},
year = {2019}
}