Photon statistics of semiconductor microcavity lasers.
We present measurements of first- and second-order coherence of quantum-dot micropillar lasers together with a semiconductor laser theory. Our results show a broad threshold region for the observed high-beta microcavities. The intensity jump is accompanied by both pronounced photon intensity fluctuations and strong coherence length changes. The investigations clearly visualize a smooth transition from spontaneous to predominantly stimulated emission which becomes harder to determine for high beta. In our theory, a microscopic approach is used to incorporate the semiconductor nature of quantum dots. The results are in agreement with the experimental intensity traces and the photon statistics measurements.
Ulrich
S M
SM
Institut für Strahlenphysik, Universität Stuttgart, Germany. s.ulrich@physik.uni-stuttgart.de
Gies
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Ates
S
S
Wiersig
J
J
Reitzenstein
S
S
Hofmann
C
C
Löffler
A
A
Forchel
A
A
Jahnke
F
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Michler
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