Dresden 2006 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 18: Polymer Materials II

CPP 18.2: Vortrag

Mittwoch, 29. März 2006, 16:00–16:15, ZEU 114

Optical or electrical poling of azo-dye layers — •Ansgar Draude¹, Sven Verpoort¹, Rafael Meinhardt¹, Hilmar Franke¹, and Roger A. Lessard² — ¹Fachbereich Physik / Angewandte Physik, Universität Duisburg-Essen, Lotharstr. 1, D-47048 Duisburg, Germany — ²COPL, department de physique, génie physique et optique, Université Laval, Québec, Canada G1K7P4

Polycrystalline films of the azo-material DR1 have been investigated. After evaporation on glass substrates the molecules are randomly orientated.

The molecules can be reoriented using different technics. Optically transparent regions may be formed either by light exposure using the Trans-Cis photo-isomerization (optical poling) or by an electrical Corona (electrical poling). The optical anisotropy has been measured by the angular dependence of the absorption-coefficient.

Stable holographic gratings may be recorded as well in the randomly oriented as in the pre-oriented regions. Measuring the topology (AFM or profilometer) indicates a relation between orientational order and material flow.