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 Mariette³ — ¹Experimentelle 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.