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CPP: Chemische Physik und Polymerphysik

CPP 23: POSTER Functional Organic Thin Films

CPP 23.38: Poster

Donnerstag, 30. März 2006, 17:00–19:00, P2

Lasing from Optically Structured Organic Microcavities — •Philipp Schneeweiß, Marko Swoboda, Robert Gehlhaar, Vadim G. Lyssenko, Michael Hoffmann, and Karl Leo — Institut für Angewandte Photophysik, Technische Universität Dresden, 01062 Dresden, Germany, www.iapp.de

The emissive properties of an organic microcavity laser filled with the guest:host system of tris-(8-hydroxy quinoline)aluminium (AlQ₃) and 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) are studied. Simultaneous excitation with two pump-pulses leads to the formation of an interference grating-structure in the active layer. Besides to the expected vertical cavity-surface emitting laser behaviour, this results in two additional outer modes appearing under an angle defined by the distance of the interference fringes. The outer modes show a blueshift varying around 0.2 nm that can be tuned with the interference pattern. Optical anisotropy in the dielectric layers of the microcavity mirrors leads to polarization splitting and emission at two perpendicularly polarized lines.