Gold nanoparticles deposited on fluorine-doped tin oxide substrates as materials for laser operated optoelectronic devices
Journal Article
Kityk, E. Al-Harbi, M. A. Aziz, M. Oyama, A. M. El-Naggar, N. AlZayed, A. Wojciechowski, I. V. . 2013
Publication Online URL:
Magazine \ Newspaper:
J Mater Sci: Mater Electron
Issue Number:
24
Pages:
2422–2425
Publication 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 nanoparticlesmodified 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