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Updated: Feb 28, 2026

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

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Published on: October 13, 2017

A solid state source of photon triplets based on quantum dot molecules.

Milad Khoshnegar^1,2,3, Tobias Huber⁴, Ana Predojević⁴

¹Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1.

Nature Communications

|June 13, 2017

Summary

This summary is machine-generated.

Researchers generated photon triplets from coupled quantum dots, a key step for quantum information technologies. This solid-state source offers high rates for advanced quantum experiments and networks.

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Area of Science:

Quantum Information Science
Solid-State Physics
Quantum Optics

Background:

Advanced quantum states of light are crucial for quantum information technologies.
Multipartite photon states are needed for quantum mechanics tests and quantum optical networks.
Solid-state systems offer advantages for generating and handling quantum states.

Purpose of the Study:

To directly produce photon triplets using coupled quantum dots.
To enable simpler handling and reversible quantum information transfer.
To advance the development of quantum optical networks and protocols.

Main Methods:

Utilized the ground states of two optically active coupled quantum dots.
Induced triexciton formation leading to triple cascade recombination.
Employed continuous-wave pumping to generate photon triplets.

Main Results:

Successfully produced photon triplets with strong correlations.
Achieved a generation rate of 65.62 photon triplets per minute.
Demonstrated a rate surpassing previously reported sources.

Conclusions:

The developed solid-state system directly generates photon triplets.
This work facilitates multipartite photon entanglement and multi-qubit readout schemes.
The findings pave the way for advanced quantum information processing.