Pure emitter dephasing : a resource for advanced solid-state single photon sources

TL;DR

This paper demonstrates that pure emitter dephasing can be harnessed to develop advanced solid-state single-photon sources with stable spectral properties, combining cavity quantum electrodynamics effects and dephasing.

Contribution

It introduces a theoretical analysis showing how pure dephasing enables cavity emission of photons with stable spectral features, useful for quantum photonics.

Findings

Cavity can emit photons with its spectral characteristics despite emitter incoherence

Pure dephasing can be exploited to stabilize photon wavelength

Potential for robust single-photon sources against spectral diffusion

Abstract

We have computed the spectrum emitted spontaneously by a quantum dot coupled to an arbitrarily detuned single mode cavity, taking into account pure dephasing processes. We show that if the emitter is incoherent, the cavity can efficiently emit photons with its own spectral characteristics. This effect opens unique opportunities for the development of devices exploiting both cavity quantum electrodynamics effects and pure dephasing, such as wavelength stabilized single photon sources robust against spectral diffusion.