Regensburg 2016 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 36: Poster Ib

HL 36.33: Poster

Dienstag, 8. März 2016, 15:00–19:00, Poster A

Exciton polaritons in CdMgTe / CdZnTe waveguides — •Felix Spitzer1, Ilya Akimov1, Manfred Bayer1, Nils Weber2, Cedrik Meier2, Torsten Meier2, Régis Andre3, and Henri Mariette31Experimentelle Physik II, TU Dortmund, D-44221 Dortmund, Germany — 2Department Physik, Universität Paderborn, D-33098 Paderborn, Germany — 3Institut Néel (Centre National de la Recherche Scientifique), 25 Avenue des Martyrs, 38042 Grenoble, Frankreich

The steady-state reflectivity of a CdMgTe / CdZnTe waveguide structure was measured using Fourier imaging spectroscopy. One dimensional metallic gratings are used to couple far field radiation with waveguiding modes. The angular and wavelength resolved reflectivity exhibits the underlying waveguide dispersion and its interaction with the excitonic resonance. The polarization resolved data shows TE- and TM-waveguiding modes. These results are consistent with angle resolved photoluminescence, where the emission is coupled out under a given angle, depending on the grating period.

The dispersion of waveguiding modes flattens strongly in the vicinity of exciton resonance. Here we demonstrate, that the group velocity can be increased by more than one order of magnitude.

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