Regensburg 2007 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 36: Heterostructures
HL 36.3: Vortrag
Donnerstag, 29. März 2007, 10:30–10:45, H14
Semiconductor Laser Emission in Realistic Dielectric Structures — •Martin Schafer1, Walter Hoyer1, Mackillo Kira1, Stephan W. Koch1, Matthias Reichelt2, Joerg Hader2, and Jerome Moloney2 — 1Department of Physics and Material Sciences Center, Philipps-University, Renthof 5, D-35032 Marburg, Germany — 2Arizona Center for Mathematical Sciences, University of Arizona, Tucson, Arizona
Photoluminescence measurements provide an important tool for the characterization of laser devices. It is well known that realistic dielectric structures can strongly alter the quantum-well photoluminescence with respect to its emission in free space.
In order to investigate the modifications of photoluminescence spectra for different dielectric structures, a microscopical many-body theory is combined with a quantum theory of the electro-magnetic field, that is expanded in terms of the mode functions of the dielectric structure. In the strong coupling regime, a complete treatment of the stimulated emission is essential. For weak coupling between the quantum-well and the light field, the luminescence modifications can be obtained by multiplying the pure quantum-well emission with a frequency dependent filter function.