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 language | English |
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Article number | 165314 |
Number of pages | 5 |
Journal | Physical Review. B, Condensed matter and materials physics |
Volume | 81 |
Issue number | 16 |
DOIs | |
Publication status | Published - 15 Apr 2010 |
Keywords
- PHASE-TRANSITION
- MICROCAVITY
- CAVITY