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HL: Fachverband Halbleiterphysik
HL 16: Microcavities
HL 16.1: Talk
Monday, March 14, 2011, 14:30–14:45, FOE Anorg
Interdependence of first- and second-order coherence for quantum-dot micropillar lasers — •Jean-Sebastian Tempel1, Ilya Akimov1, Marc Aßmann1, Christian Schneider2, Sven Höfling2, Caroline Kistner2, Stephan Reitzenstein2, Lukas Worschech2, Alfred Forchel2, and Manfred Bayer1 — 1Experimentelle Physik 2, Technische Universität Dortmund, 44221 Dortmund — 2Technische Physik, Physikalisches Institut, Universität Würzburg, 97074 Würzburg
We present investigations on the coherence of the emission from the fundamental mode of a quantum-dot microcavity laser. We measured the first-order field-correlation function g(1)(τ) with a Michelson interferometer, from which we directly determine the coherence time. To fully characterize the coherence properties of the cavity emission, we apply a model that connects first- and second-order coherence. Hereby it is possible to overcome the limited sensitivity of the streak camera used for photon correlation measurements, and thus to extend the accessible excitation power range for g(2)(τ) down to the thermal regime.