Dresden 2006 – scientific programme

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CPP: Chemische Physik und Polymerphysik

CPP 25: POSTER Electronic Structure and Spectroscopy

CPP 25.16: Poster

Thursday, March 30, 2006, 17:00–19:00, P2

Non-linear optical properties of fluorescein — •Christian Meffert, Sven Verpoort, and Hilmar Franke — Fachbereich Physik / Angewandte Physik, Universität Duisburg-Essen, Lotharstr. 1, D-47048 Duisburg, Germany

During the irradiation of an optical cuvette filled with flourescein by laser-light a self-focusing effect has been detected. At first this effect has been measured quantitatively before the light-induced change of the refractive index has been characterized. The refractive index change of guest-host films was measured as a function of light exposure using ATR leaky mode spectroscopy. Fluorescein has been indiffused into the polymer Nafion. The non-linear optical feedback of the ATR-layer stack with the incoupling light has been investigated. Finally the non-linear influence on the fluorescence coupling in optical fibers is being discussed.