Priv.-Doz Uwe Bandelow
Weierstrass Institute for Applied Analysis and Stochastics (WIAS), Berlin, Germany
Modeling and Simulation of electrically driven quantum dot based single-photon sources
A short survey over selected research activities in photonics at WIAS will be given in the beginning. This includes modeling and simulation of nonlinear pulse propagation, as well as of semiconductor lasers and single-photon emitters.
Then a hybrid quantum-classical modeling approach for the simulation of quantum light emitting diodes will be introduced, which is based on the self-consistent coupling of semi-classical carrier transport theory and microscopic models from semiconductor quantum optics. The approach allows for a comprehensive description of QD-based devices on multiple scales: It enables the calculation of the spatially resolved injection current in realistic, multi-dimensional device geometries together with the quantum optical properties of the microscopic QD-photon system (non-classical correlation functions of the optical field, photon emission rate, power spectrum and spectral shifts) out of one box. The approach goes beyond existing multi-scale approaches in semiconductor device simulation and closes a gap between microscopic and macroscopic simulation tools that could be useful to support the development of future devices. Moreover, the model system is shown to be consistent with fundamental principles of (non-)equilibrium thermodynamics – in particular it obeys the second law of thermodynamics. The quantum-classical modeling approach is demonstrated by numerical simulations of an electrically driven single-photon source.
Biography
Uwe Bandelow was born in Templin, Germany, in 1962. He received the Diploma and Ph.D. degrees from Humboldt University, Berlin, Germany, in 1991 and 1994, respectively, both in physics. His doctoral dissertation was concerned with theory and modeling of multisection DFB lasers. Since 1996 he is with the Weierstrass Institute for Applied Analysis and Stochastics, Berlin, where he has been leading the research group ”Laserdynamics” since 2005. After his habilitation in theoretical physics 2009 he is teaching as a Priv.-Doz. at Humboldt University Berlin. His present research interests include modeling and simulation of optoelectronic devices and propagation of pulses in nonlinear optical media.