Ultrafast tracking of second-order photon correlations in the emission of quantum-dot microresonator lasers

Marc Assmann*, Franziska Veit, Manfred Bayer, Christopher Gies, Frank Jahnke, Stephan Reitzenstein, Sven Höfling, Lukas Worschech, Alfred Forchel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

Ultrafast changes in the statistical properties of light emission are studied for quantum-dot micropillar lasers. Using pulsed excitation with varying power, we follow the time evolution of the second-order correlation function g((2))(t, tau = 0) reflecting two-photon coincidences and compare it to that of the output intensity. The previously impossible time resolution of a few picoseconds gives insight into the dynamical transition between thermal and coherent light emission. The g((2)) results allow us to isolate the spontaneous and stimulated-emission contributions within an emission pulse, not accessible via the emission-intensity dynamics. Results of a microscopic theory confirm the experimental findings.

Original languageEnglish
Article number165314
Number of pages5
JournalPhysical Review. B, Condensed matter and materials physics
Volume81
Issue number16
DOIs
Publication statusPublished - 15 Apr 2010

Keywords

  • PHASE-TRANSITION
  • MICROCAVITY
  • CAVITY

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