Berlin 2012 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 25: Poster Session: GaN - Optical Properties & Preparation and Characterization & Devices

HL 25.1: Poster

Montag, 26. März 2012, 16:00–19:00, Poster D

Feedback Control of a Quantum Dot Cavity-QED System — •Franz Schulze, Alexander Carmele, and Andreas Knorr — Institut für Theoretische Physik, Technische Unitversität Berlin, Germany

We investigate externally pumped quantum dots embedded in a nano-cavity within an equation-of-motion-approach.[1] In the limit of many emitters and photons the standard cluster expansion scheme is a well-known factorization procedure to investigate quantum light emission.[2] A possible way of stabilizing this emission and its statistical properties is a time delayed self-feedback as it is described classically by the Lang-Kobayashi model.[3] Here, we discuss the transition from the classical [4] to the quantum mechanical model and present first steps toward a fully quantized feedback description.
[1] M. Richter et al., Phys. Rev. Lett. 103, 087407 (2009)
[2] C. Gies et al., Phys. Rev. A 75, 013803 (2007)
[3] R. Lang and K. Kobayashi, IEEE J. Quantum Electron. 16, 347 (1980)
[4] C. Otto et al., Phys. Status Solidi B 247, 829 (2010)