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Interaction of laser radiation with Au nanoparticles in SiO2 thin films

M. SENDOVA-VASSILEVA1,* , M. SENDOVA2, H. HOFMEISTER3, J. C. PIVIN4

Affiliation

  1. Central Laboratory of Solar Energy and New Energy Sources, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria
  2. New College of Florida, 5800 Bay Shore Road, Sarasota, FL 34243-2109, USA
  3. Max Planck Institute for Microstructure Physics, Weinberg 2, D-06120 Halle, Germany
  4. CSNSM, CNRS, Bâtiment 108, 91405 Orsay Campus, France

Abstract

Thin films of SiO2 containing gold nanoparticles were prepared by magnetron co-sputtering followed by thermal annealing. The samples were irradiated with a pulsed Nd:YAG laser to study the possibility of modifying the nanoparticle size distribution. A small, but observable increase of the mean size of the particles and of the number of larger particles was observed. The surface roughness of the films increased and ripples on the surface were formed after laser irradiation. The growth of the particles was attributed to photostimulated Ostwald ripening. The effects of the laser irradiation on the film are discussed..

Keywords

Surface plasmons, Surface roughness, Ostwald ripening, Metal nanoparticles, Thin films.

Submitted at: Feb. 9, 2009
Accepted at: Aug. 7, 2009

Citation

M. SENDOVA-VASSILEVA, M. SENDOVA, H. HOFMEISTER, J. C. PIVIN, Interaction of laser radiation with Au nanoparticles in SiO2 thin films, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 8, pp. 1071-1076 (2009)