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Updated: May 11, 2026
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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
Published on: October 13, 2017
On-chip time resolved detection of quantum dot emission using integrated superconducting single photon detectors
G Reithmaier1, S Lichtmannecker, T Reichert
1Walter Schottky Institut, Physik Department and Center of Nanotechnology and Nanomaterials, Technische Universität München, 85748 Garching, Germany. guenther.reithmaier@wsi.tum.de
Scientific Reports
|May 29, 2013
Summary
We efficiently routed quantum light from InGaAs quantum dots (QDs) into GaAs waveguides and detected it on-chip using superconducting nanowire single-photon detectors (SSPDs). This hybrid system significantly enhances on-chip quantum optics performance.
Area of Science:
- Quantum Optics
- Nanophotonics
- Solid-State Physics
Background:
- Quantum dots (QDs) are promising sources for quantum light.
- On-chip integration of quantum light sources and detectors is crucial for quantum technologies.
Purpose of the Study:
- To demonstrate efficient routing and on-chip detection of quantum light from InGaAs QDs.
- To evaluate the performance of superconducting nanowire single-photon detectors (SSPDs) coupled to photonic waveguides.
Main Methods:
- Coupling quantum light from self-assembled InGaAs quantum dots into GaAs ridge waveguides.
- Utilizing evanescent coupling to integrate NbN superconducting nanowire single-photon detectors (SSPDs).
- Performing in-situ time-resolved measurements for spontaneous emission lifetime and timing jitter.
Main Results:
- Efficient routing of QD luminescence into waveguide optical modes.
- SSPDs primarily detected QD emission, with negligible scattered laser light.
- Detection efficiency improved by two orders of magnitude compared to normal incidence illumination.
- Measured average QD spontaneous emission lifetime of 0.95 ns with 72 ps timing jitter.
Conclusions:
- Demonstrated strong potential for on-chip few-photon quantum optics.
- Validated the performance of semiconductor-superconductor hybrid systems for quantum applications.
- Highlighted the advantages of evanescent coupling for enhanced detector efficiency.
