Regensburg 2004 – scientific programme

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O: Oberflächenphysik

O 32: Nanostrukturen III

O 32.6: Talk

Thursday, March 11, 2004, 12:30–12:45, H38

Fs laser activated fluorescence from silver oxide nanoparticles — •T. Gleitsmann, B. Stegemann, T. M. Bernhardt, and L. Wöste — Freie Universität Berlin, Institut für Experimentalphysik, Arnimallee 14, D-14195 Berlin, Germany

Fluorescence from silver oxid nanoparticles was investigated by means of confocal scanning laser microscopy. This setup allowed us to perform very fast photo activation by scanning focused 800 nm fs-pulses from a Ti: Saphire laser over the thin particle film. Fluorescence of the nanoparticles was excited by subsequent scanning over the sample with an Ar/Kr - laser. Depending on excitation wavelengths (488 nm or 576 nm) strong fluorescence in the green or red domain was observed. The writing efficiencies were examined both as functions of excitation intensity and exposure time.