Mode-Switching induced super-thermal bunching in quantum-dot microlasers

Christoph Redlich, Benjamin Lingnau, Steffen Holzinger, Elisabeth Schlottmann, Soren Kreinberg, Christian Schneider, Martin Kamp, Sven Höfling, Janik Wolters, Stephan Reitzenstein, Kathy Ludge

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)


The super-thermal photon bunching in quantum-dot micropillar lasers is investigated both experimentally and theoretically via simulations driven by dynamic considerations. Using stochastic multi-mode rate equations we obtain very good agreement between experiment and theory in terms of intensity profiles and intensity-correlation properties of the examined quantum-dot micro-laser’s emission. Further investigations of the time-dependent emission show that super-thermal photon bunching occurs due to irregular mode-switching events in the bimodal lasers. Our bifurcation analysis reveals that these switchings find their origin in an underlying bistability, such that spontaneous emission noise is able to effectively perturb the two competing modes in a small parameter region. We thus ascribe the observed high photon correlation to dynamical multistabilities rather than quantum mechanical correlations.
Original languageEnglish
Article number063011
Number of pages11
JournalNew Journal of Physics
Early online date9 Jun 2016
Publication statusPublished - Jun 2016


  • Nonlinear dynamics
  • Microlaser
  • Correlation properties
  • Photon statistics
  • Noise and multimode dynamics
  • Quantum dot laser


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