Dresden 2009 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 9: Poster 1
HL 9.106: Poster
Montag, 23. März 2009, 14:30–17:00, P2
Electron Dynamics in Light Emitting Quantum-Dot Heterostructures with Momentum Resolved Carrier-Phonon Scattering — •Janik Wolters1, Matthias–René Dachner1, Ulrike Woggon2, Andreas Knorr1, and Marten Richter1 — 1Institut für Theoretische Physik, Technische Universität Berlin — 2Institut für Optik und Atomare Physik, Technische Universität Berlin
We present a microscopic theory of the light emission dynamics of an electrically pumped quantum dot emitter below laser threshold.
The structure consists of a bulk semiconductor and Stranski-Krastanov grown InGaAs/GaAs quantum dot layers, operating at room temperature.
Transport through the structure is driven by scattering with longitudinal-optical phonons, including nonequilibrium phonons.
It appears that even though the phonon distribution remains thermal, there is a substantial carrier heating in the quantum wells.