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Erschienen in:
01.07.2013
Gold nanoparticles deposited on fluorine-doped tin oxide substrates as materials for laser operated optoelectronic devices
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 7/2013
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Abstract
We have discovered occurrence of strong narrow spectral lines in gold nanoparticles deposited on fluorine-doped tin oxide substrates at wavelengths 410, 440 and 550 nm under influence of 808 nm wavelength laser illumination with power about 200 mW. These lines appear just after the 1 s of illumination and are almost unchanged during all the remaining time of illumination. Such lines are absent for the other content of gold nanoparticles-modified substrates. So a principle role here is played by the inter-particle distances. The relaxation process is continued during 8–10 h and the samples return to their initial states. The occurrence of the such narrow spectral lines may be a consequence of the two-photon absorption related with the corresponding electron–phonon interactions due to specific interactions between the plasmons and the phonon subsystem and the free carriers.