Dispersive coupling between MoSe2 and a zero-dimensional integrated nanocavity

TL;DR

This paper demonstrates a dispersive coupling between monolayer MoSe2 excitons and a zero-dimensional nanocavity, showing potential for strong light-matter interactions at low temperatures in quantum nanophotonics.

Contribution

It reports the first observation of dispersive coupling between MoSe2 excitons and a nanocavity, with quantified coupling strength and potential for strong coupling at lower temperatures.

Findings

Dispersive shift of cavity resonance observed with decreasing detuning.

Estimated exciton-cavity coupling of approximately 4.3 meV.

Predicted strong coupling regime at 4 Kelvin with C~380.

Abstract

Establishing a coherent interaction between a material resonance and an optical cavity is a necessary first step for the development of semiconductor quantum optics. Here we demonstrate a coherent interaction between the neutral exciton in monolayer MoSe2 and a zero-dimensional, small mode volume nanocavity. This is observed through a dispersive shift of the cavity resonance when the exciton-cavity detuning is decreased, with an estimated exciton-cavity coupling of ~4.3 meV and a cooperativity of C~3.4 at 80 Kelvin. This coupled exciton-cavity platform is expected to reach the strong light-matter coupling regime (i.e., with C~380) at 4 Kelvin for applications in quantum or ultra-low power nanophotonics.