Towards on-chip generation, routing and detection of non-classical light

TL;DR

This paper demonstrates an integrated photonic chip combining quantum dot emitters, waveguides, and superconducting detectors, enabling on-chip generation, routing, and detection of non-classical light for quantum photonics applications.

Contribution

It presents the first integrated system with on-chip quantum dot emission, routing, and superconducting detection, including resonant excitation and fluorescence detection capabilities.

Findings

Successful on-chip detection of quantum dot photoluminescence

Resonant excitation and fluorescence detection achieved on-chip

Fast temporal response of detectors enables time-resolved studies

Abstract

We fabricate an integrated photonic circuit with emitter, waveguide and detector on one chip, based on a hybrid superconductor-semiconductor system. We detect photoluminescence from self-assembled InGaAs quantum dots on-chip using NbN superconducting nanowire single photon detectors. Using the fast temporal response of these detectors we perform time-resolved studies of non-resonantly excited quantum dots. By introducing a temporal filtering to the signal, we are able to resonantly excite the quantum dot and detect its resonance uorescence on-chip with the integrated superconducting single photon detector.