Boosting Optical Nanocavity Coupling by Retardation Matching to Dark Modes
Optics
2022-10-21 v1 Mesoscale and Nanoscale Physics
Materials Science
Soft Condensed Matter
Abstract
Plasmonic nano-antennas can focus light to nanometre length-scales providing intense field enhancements. For the tightest optical confinements (0.5-5 nm) achieved in plasmonic gaps, the gap spacing, refractive index, and facet width play a dominant role in determining the optical properties making tuning through antenna shape challenging. We show here that controlling the surrounding refractive index instead allows both efficient frequency tuning and enhanced in/output-coupling through retardation matching as this allows dark modes to become optically active, improving widespread functionalities.
Keywords
Cite
@article{arxiv.2210.11395,
title = {Boosting Optical Nanocavity Coupling by Retardation Matching to Dark Modes},
author = {Rohit Chikkaraddy and Junyang Huang and Dean Kos and Eoin Elliott and Marlous Kamp and Chenyang Guo and Jeremy J. Baumberg and Bart de Nijs},
journal= {arXiv preprint arXiv:2210.11395},
year = {2022}
}