Real-time two-photon interference from distinct molecules on the same chip

TL;DR

This paper demonstrates real-time two-photon interference from distinct molecules on a chip, advancing scalable solid-state quantum photonic platforms by using optically tunable molecular emitters for quantum interference experiments.

Contribution

It presents the first real-time two-photon interference experiments with multiple molecules on a chip, highlighting the potential of molecular sources for scalable quantum photonics.

Findings

Quantum interference observed in real time

Local environment effects analyzed at different time-scales

Molecular sources enable scalable quantum photonic devices

Abstract

Scalability and miniaturization are hallmarks of solid-state platforms for photonic quantum technologies. Still a main challenge is two-photon interference from distinct emitters on chip. This requires local tuning, integration and novel approaches to understand and tame noise processes. A promising platform is that of molecular single photon sources. Thousands of molecules with optically tuneable emission frequency can be easily isolated in solid matrices and triggered with pulsed excitation. We here discuss Hong-Ou-Mandel interference experiments using several couples of molecules within few tens of microns. Quantum interference is observed in real time, enabling the analysis of local environment effects at different time-scales.