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Related Experiment Video

Updated: May 3, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Deterministic and electrically tunable bright single-photon source.

A K Nowak¹, S L Portalupi¹, V Giesz¹

¹Laboratoire de Photonique et de Nanostructures, CNRS, UPR20, Route de Nozay, 91460 Marcoussis, France.

Nature Communications

|February 6, 2014

Summary

This summary is machine-generated.

Researchers developed a novel microcavity structure for semiconductor quantum dots, enabling electrical control and deterministic coupling. This breakthrough paves the way for scalable quantum networks and efficient single-photon sources.

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Area of Science:

Quantum optics
Solid-state physics
Nanotechnology

Background:

Scalable quantum networks require electrical control of quantum dot states and emission.
Integrating electrical contacts with microphotonic structures for quantum emitters is a significant technological challenge.

Purpose of the Study:

To present a novel photonic structure and fabrication technology for deterministic electrical control of quantum dots in a microcavity.
To demonstrate an electrically tunable single-photon source with high extraction efficiency.

Main Methods:

Fabrication of a micropillar cavity connected to a planar cavity via 1D wires.
Development of an advanced in-situ lithography technique for deterministic quantum dot coupling.
Integration of a diode structure for electrical tunability.

Main Results:

Achieved confined optical modes with quality factors up to 33,000.
Demonstrated deterministic spatial and spectral coupling of a single quantum dot.
Realized an electrically tunable single-photon source with 53 ± 9% extraction efficiency.

Conclusions:

The developed photonic structure and technology enable deterministic electrical control of quantum dots.
This work presents a significant advancement towards scalable quantum networks and efficient quantum light sources.