Observation of Strong Coupling between an Inverse Bowtie Nano-Antenna and a Single J-aggregate

TL;DR

This paper reports the experimental observation of strong coupling between a single J-aggregate and an inverse bowtie nano-antenna, revealing hybrid modes with significant Rabi splitting, dependent on orientation and confirmed by simulations.

Contribution

It demonstrates for the first time strong coupling between a single J-aggregate and an inverse bowtie plasmonic structure with detailed experimental and numerical analysis.

Findings

Observation of three hybrid modes indicating strong coupling

Rabi splitting of up to 290 meV observed

Consistent results across different nanostructure arrays

Abstract

We demonstrate strong coupling between a single J-aggregate and an inverse bowtie plasmonic structure, when the J-aggregate is located at a specific axial distance from the metallic surface. Three hybrid modes are clearly observed, witnessing a strong interaction, with a Rabi splitting of up to 290 meV, the precise value of which significantly depends on the orientation of the J-aggregate with respect to the symmetry axis of the plasmonic structure. We repeated our experiments with a set of triangular hole arrays, showing consistent formation of three or more hybrid modes, in good agreement with numerical simulations.