Dye-activated hybrid organic/inorganic mesostructured titania waveguides |
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Authors: | Bartl Michael H Boettcher Shannon W Hu Evelyn L Stucky Galen D |
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Affiliation: | Department of Chemistry and Biochemistry , University of California, Santa Barbara, CA 93106, USA. |
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Abstract: | A room-temperature synthesis route for the fabrication of a new type of hybrid organic/inorganic mesostructured material based on titania instead of silica as the inorganic component has been developed. This approach enables facile processing of the titania/block copolymer surfactant precursor solution into optically activated, transparent, and crack-free fibers and planar waveguides with adjustable thickness. Stabilization of the structures occurs upon solvent evaporation by formation of a solid, glasslike material without heat treatment. These dye-activated, high refractive index, titania-based composites show efficient waveguiding and mirrorless lasing at low thresholds without the need of an ultralow refractive index support layer. |
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