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Related Experiment Video

Updated: May 31, 2026

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

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

Published on: October 13, 2017

Observing chaos for quantum-dot microlasers with external feedback.

Ferdinand Albert1, Caspar Hopfmann, Stephan Reitzenstein

  • 1Technische Physik and Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Physikalisches Institut, Universität Würzburg, Am Hubland, Würzburg D-97074, Germany.

Nature Communications
|June 23, 2011
PubMed
Summary
This summary is machine-generated.

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Researchers demonstrated chaos in quantum-dot microlasers, observing super-thermal photon bunching due to self-feedback. This finding opens new avenues for studying chaos in quantum systems with low-power devices.

Area of Science:

  • Nonlinear dynamics and quantum optics.
  • Semiconductor device physics.

Background:

  • Chaos is a phenomenon in nonlinear systems, often involving feedback.
  • Conventional semiconductor lasers are used to study chaos and generate random numbers.

Purpose of the Study:

  • To experimentally demonstrate chaos in quantum-dot microlasers near the quantum limit.
  • To investigate the effect of self-feedback on photon statistics in these devices.

Main Methods:

  • Applying self-feedback to quantum-dot microlasers operating at nW output powers.
  • Analyzing photon statistics to identify chaotic behavior.

Main Results:

  • Observed strong, super-thermal photon bunching, indicating random-intensity fluctuations.

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Related Experiment Videos

Last Updated: May 31, 2026

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

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

Published on: October 13, 2017

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
12:19

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

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  • Demonstrated that gain competition in few quantum dots enhances self-feedback effects.

    • Conclusions:

    • Chaos can be observed in quantum-dot microlasers at low output powers.
    • Self-feedback in these systems leads to unique photon statistics, advancing the study of quantum chaos.