Excitation of surface plexciton wave at interface of a metal and a columnar thin film infiltrated with J-aggregate dyes

TL;DR

This paper theoretically investigates the excitation of surface plexciton waves at a metal and columnar thin film interface infiltrated with J-aggregate dyes, revealing tunable strong coupling and energy transfer characteristics.

Contribution

It introduces a transfer matrix method analysis of plexciton excitation, demonstrating tunable plasmon-exciton interaction and detailed wave propagation properties.

Findings

Rabi splitting energies of 204-378 meV indicating strong coupling

Surface plexciton waves localized at the interface

Propagation speeds up to 0.9c with lengths up to 6 μm

Abstract

In this paper, we report theoretical investigation on excitation of surface plexciton wave at interface of a metal and a columnar thin film infiltrated with J-aggregate dyes using transfer matrix method in Kretschmann configuration. The results reveal the regime of the plasmon - exciton interaction can change from weak to strong by tuning structural parameters. We find Rabi splitting energies between 204 -378 meV corresponding to the time period 11-20 fs which includes to the fast energy transfer from surface plasmon polaritons to excitons. The phase speed and propagation length of surface plexcitonic waves were in the range of 0.4 to 0.9c and 0.4 to 6 {\mu}m. The time-averaged Poynting vector of surface plexciton waves shows the localization of them at interface of plasmonic and excitonic mediums.