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HL: Fachverband Halbleiterphysik
HL 48: Poster 2
HL 48.52: Poster
Thursday, March 26, 2009, 15:00–17:30, P2
Interferometric measurement of polarization dynamics in QDs — •Manuel Huber1,2, Christian Wolpert1,2, and Markus Lippitz1,2 — 1Max Planck Institute for Solid State Research, Stuttgart — 24th Physical Institute, University of Stuttgart
Most coherent experiments on excitonic states in QDs investigate an absolute value of the polarization. We want to be able to measure both the real and imaginary part to fully reconstruct the azimuthal state of the Bloch-vector. To achieve this aim we propose a method for a pump-probe setup using an interferometer, inspired by differential interference contrast microscopy. The interference of superposed reference and signal pulses is used to either perform phase- or amplitude-sensitive measurements.
We will show the principle of the setup and theoretical simulations as well as first experimental results for pump-induced excitonic states.