Tunable WS$_2$ Micro-Dome Open Cavity Single Photon Source

TL;DR

This paper demonstrates a tunable, scalable single-photon source using WS$_2$ micro-domes integrated into an open microcavity, with verified single-photon emission and analysis of phonon effects, advancing quantum photonics.

Contribution

It introduces a novel WS$_2$ micro-dome single-photon source with tunable emission integrated into an open cavity, enabling enhanced control over atomically thin quantum emitters.

Findings

Single-photon emission verified with $g^{(2)}(0)=0.3$

Spectral analysis shows phonon sidebands influence emission

Open cavity system enhances emitter-cavity interaction

Abstract

Versatile, tunable, and potentially scalable single-photon sources are a key asset in emergent photonic quantum technologies. In this work, a single-photon source based on WS$_2$ micro-domes, created via hydrogen ion irradiation, is realized and integrated into an open, tunable optical microcavity. Single-photon emission from the coupled emitter-cavity system is verified via the second-order correlation measurement, revealing a $g^{(2)}(\tau=0)$ value of 0.3. A detailed analysis of the spectrally selective, cavity enhanced emission features shows the impact of a pronounced acoustic phonon emission sideband, which contributes specifically to the non-resonant emitter-cavity coupling in this system. The achieved level of cavity-emitter control highlights the potential of open-cavity systems to tailor the emission properties of atomically thin quantum emitters, advancing their suitability for real-world quantum technology applications.