Giant Rabi splitting in metallic cluster-cavity system

TL;DR

This paper theoretically demonstrates that embedding alkali atom clusters in a microcavity can lead to giant Rabi splitting due to strong plasmon-photon coupling, significantly exceeding previous quantum dot-cavity results.

Contribution

It introduces the concept of giant Rabi splitting in metallic cluster-cavity systems, highlighting the potential for enhanced light-matter interactions.

Findings

Strong coupling causes mode anticrossing and doublet structures in absorption.

Rabi splitting values are predicted to be several orders larger than in quantum dot systems.

Theoretical analysis of plasmon-cavity interactions in alkali atom clusters.

Abstract

We investigate theoretically the photo absorbtion of the cluster of alkali atoms embedded into a single mode quantum microcavity. We show that when the energy of the giant plasmonic resonance lies close to the energy of the cavity mode, the strong coupling between plasmon and cavity photon can occur, which is characterized by mode anticrossing and observation of the doublet structure in ptotoabsorbtion. The characteristic values of the Rabi splitting are expected to be several orders of magnitude larger then those observed in single quantum dot-cavity systems.