Femtosecond-laser-activated fluorescence from silver oxide nanoparticles

被引：30

作者：

Gleitsmann, T ^{[1
]}

Stegemann, B ^{[1
]}

Bernhardt, TM ^{[1
]}

机构：

[1] Free Univ Berlin, Inst Expt Phys, D-14195 Berlin, Germany

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 20期

关键词：

D O I：

10.1063/1.1751613

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A method for fast spatially resolved photoactivation of fluorescence from silver oxide nanoparticle films is presented. High activation rates are achieved through fast scanning of a focused high repetition rate 800 nm femtosecond laser with a peak power of 6.5 MW/cm(2) over the sample. The activated areas of the thin films show fluorescence after subsequent excitation with an Ar+/Kr+ laser. The fluorescent properties were investigated by means of scanning laser microscopy at ambient conditions. Depending on excitation wavelengths (488 or 568 nm) strong fluorescence in the green or red domain was observed. The activation efficiencies were examined both as a function of exposure time and femtosecond laser power. Sensitivity, reliability and possible mechanisms for the photoactivation process are discussed. (C) 2004 American Institute of Physics.

引用

页码：4050 / 4052

页数：3

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