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CPP: Chemische Physik und Polymerphysik
CPP 17: Poster: Spectroscopy and Single Particle Spectroscopy of Molecular Systems, Photoprocesses, Biological Systems
CPP 17.12: Poster
Tuesday, April 3, 2001, 12:30–15:00, AT1
Determination of optical modes in organic multilayers: Mode profile calculation and grating coupler experiments — •Alexandra Perschke1, Hilmar Franke1, and Thomas Fuhrmann2 — 1Angewandte Physik, Fachbereich Physik, Universität Duisburg, Lotharstr. 1, 47048 Duisburg — 2Makromolekulare Chemie und Molekulare Materialien, Fachbereich Physik, Uni-GH Kassel, Heinrich-Plett-Str. 40, 34109 Kassel
Organic multilayers are of great interest for optoelectronic applications such as organic light emitting diodes, lasers and solar cells. The use of low-molecular glasses allows a detailed design of specific sequences of functional layers and the preparation of devices by vacuum vapor deposition. We performed calculations based on transfer matrix methods in order to show the intensity distribution of waveguide modes which can be used for stimulated emission. The effective mode indices are measured by prism and grating coupling experiments. For the latter, we incorporated gratings with high outcoupling efficiency into one waveguide layer by direct holographic writing. Adjustment strategies of the grating constant for achieving distributed feedback are presented.