Regensburg 2007 – scientific programme

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DF: Fachverband Dielektrische Festkörper

DF 2: Internal Symposium “Nonlinearities of Photonic Materials”

DF 2.6: Talk

Monday, March 26, 2007, 12:00–12:20, H11

Hybrid materials with nonlinear optical properties — •Dominik Schaniel¹, Susanne Lisinski², Lorenz Ratke², and Theo Woike³ — ¹I. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, 50937 Köln — ²Institut für Materialphysik im Weltraum, DLR, Linder Höhe, 51170 Köln — ³Institut für Mineralogie, Universität zu Köln, Zülpicher Strasse 49b, 50674 Köln

Aerogels and xerogels are used as host matrices for a variety of guest materials. Due to their broad transparency range of 350-2500 nm they are especially interesting for the design of novel nonlinear photonic materials. E.g., silica-aerogels are synthesized in a sol-gel process leading to a porous network of SiO₂ particles with diameters of 3-5 nm and pore sizes in the range of 10 nm. Embedding micro- to nanoparticles of oxidic electrooptic materials or single photoactive molecules novel hybrid materials with nonlinear optical properties can be produced. We show first results on silica aerogels with embedded KNbO₃ and BaTiO₃ particles, where we investigated the efficiency of second harmonic generation as a function of particle size and particle density. Further prospects of such hybrid materials are discussed.