Nano Lett. 2015 Sep 09;15(9):6215-21. doi: 10.1021/acs.nanolett.5b02584. Epub 2015 Aug 12.

Aluminum Nanoantenna Complexes for Strong Coupling between Excitons and Localized Surface Plasmons.

Nano letters

Elad Eizner, Ori Avayu, Ran Ditcovski, Tal Ellenbogen, Garbarino

PMID: 26258257 DOI: 10.1021/acs.nanolett.5b02584

Abstract

We study the optical dynamics in complexes of aluminum nanoantennas coated with molecular J-aggregates and find that they provide an excellent platform for the formation of hybrid exciton-localized surface plasmons. Giant Rabi splitting of 0.4 eV, which corresponds to ∼10 fs energy transfer cycle, is observed in spectral transmittance. We show that the nanoantennas can be used to manipulate the polarization of hybrid states and to confine their mode volumes. In addition, we observe enhancement of the photoluminescence due to enhanced absorption and increase in the local density of states at the exciton-localized surface plasmon energies. With recent emerging technological applications based on strongly coupled light-matter states, this study opens new possibilities to explore and utilize the unique properties of hybrid states over all of the visible region down to ultraviolet frequencies in nanoscale, technologically compatible, integrated platforms based on aluminum.

Keywords: Strong coupling; aluminum nanoantennas; localized surface plasmons; organic polaritons

Publication Types

• Journal Article
• Research Support, Non-U.S. Gov't