Berlin 2015 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 107: Microcavities, polaritons and condensates

HL 107.9: Vortrag

Freitag, 20. März 2015, 12:30–12:45, EW 015

Dynamics of light and matter in ultrafast-switched semiconductor microcavities — •Georgios Ctistis1,2, Emre Yüce1, Henri Thyrrestrup1, Julien Claudon3,4, Allard P. Mosk1, Jean-Michel Gérard3,4, and Willem L. Vos11Complex Photonic Systems (COPS), MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands — 2Nano-Bio Interfaces, Saxion University of Applied Sciences, Enschede, The Netherlands — 3CEA/INAC/SP2M, Nanophysics and Semiconductor Laboratory, Grenoble, France — 4University Grenoble Alpes, INAC-SP2M, Nanophysics and Semiconductors Lab, F-38000 Grenoble, France

The interest in all-optical switching of photonic nanostructures is rapidly increasing due to the inherent speed of the process. Achieving all-optical switching on ultrafast timescales promises both new developments in information technology and a novel control in cavity QED. A very popular switching mechnism is thereby the excitation of free carriers. The dynamics of this process is usually explained by the recombination dynamics of the excited carriers using a single population model. Here, we present time dependent differential reflectivity measurements of a GaAs/AlAs planar microcavity over a broad frequency range. We observe that the switching dynamics shows a spectral dependence. To accurately describe and understand this behavior we propose a model beyond the existing single population model.

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DPG-Physik > DPG-Verhandlungen > 2015 > Berlin