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DS: Fachverband Dünne Schichten
DS 5: Nanophotonics - Theory of Nanophotonic Devices I
DS 5.1: Topical Talk
Monday, March 23, 2009, 11:15–11:45, GER 38
Quantum modelling of nanophotonic laser devices — •Christina Bückers1, Stephan W. Koch1, Angela Thränhardt2, Jörg Hader3,4, and Jerome V. Moloney3,4 — 1Fachbereich Physik und Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg, Renthof 5, 35032 Marburg, Germany — 2Fakultät für Naturwissenschaften, Technische Universität Chemnitz, 09107 Chemnitz, Germany — 3Optical Sciences Center, University of Arizona, Tucson, AZ 85721, USA — 4Nonlinear Control Strategies Inc., 3542 N. Geronimo Ave., Tucson, AZ 85705, USA
A microscopic theory is used to model the optical properties of semiconductor laser materials and modern devices. Typically, these devices are structured on the nanoscale such that any quantitative modelling requires a consistent quantum mechanical theory. In this talk, we show how such a many-particle approach can be used to compute the laser gain, absorption, photoluminescence as well as the radiative and Auger recombination processes. The predictive power of this modelling is demonstrated by detailed comparisons to quantitative experiments. In particular, so-called VECSEL (Vertical External Cavity Surface Emitting Laser) systems are analysed. It is shown that systematic design studies allow for device optimisation for a wide variety of different application conditions, such as high output power, emission at a particular wavelength, or low threshold.