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HL: Halbleiterphysik

HL 18: Symposium Quantum optics in semiconductors II

HL 18.5: Fachvortrag

Dienstag, 28. März 2006, 16:45–17:15, HSZ 01

Theory of optical properties for quantum dots in microcavities — •Frank Jahnke, Jan Wiersig, Norman Baer, and Christopher Gies — Institute for Theoretical Physics, University of Bremen

Semiconductor quantum dots are of strong current interest due to their application potential in light-emitting devices and single photon sources. The emission properties can be controlled to a high degree by embedding the quantum dots in a semiconductor microcavity. We present a microscopic theory for this system. In addition to carrier-photon interaction, also carrier-carrier and carrier-phonon interaction are included, which are the sources of scattering and dephasing processes. We investigate the photoluminescence dynamics for weak excitation and the laser regime for elevated pumping. The influence of the Purcell effect and of large spontaneous emission coupling on the optical properties is demonstrated. Signatures of carrier and photon correlations due to various interaction processes are analyzed.