Bright Plasmons with Cubic Nanometer Mode Volumes through Mode Hybridization
Language
en
Article de revue
This item was published in
ACS photonics. 2021-01-07, vol. 8, n° 1, p. 307-314
American Chemical Society
English Abstract
We propose a new interpretation for light confinement in picocavities formed by ultrasmall metallic protuberances inside the gap of metal−insulator−metal nanoresonators. We demonstrate that the protuberances support dark ...Read more >
We propose a new interpretation for light confinement in picocavities formed by ultrasmall metallic protuberances inside the gap of metal−insulator−metal nanoresonators. We demonstrate that the protuberances support dark resonances with mode volumes comparable to their geometric volumes and that their brightness can be enhanced by several orders of magnitude when they are strongly coupled with the modes of nanoresonators with nanometric dielectric spacers. With a simple and accurate closed-form expression, we clarify the role of gap plasmons in this coupling. Based on this understanding, we propose a general strategy, exploiting strong coupling to design extremely localized modes with cubic nanometer volumes and so-far unreached brightness.Read less <
English Keywords
Metrics & More Article Recommendations plasmonics
nanogap
picocavities
Metrics & More Article Recommendations plasmonics
strong coupling
quasinormal mode
quenching
Origin
Hal imported