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Glasses containing silver nano particles irradiated by ultrashort multi wavelength femtosecond laser

O. VERON1, J.-P. BLONDEAU1,* , B. CAPOEN2, D. JEGOUSO2

Affiliation

  1. Institut PRISME - UPRES 4229, Orleans University, 21 rue de Loigny La Bataille, 28000 Chartres, France
  2. PhLAM -UMR8523, Université de Lille 1-CNRS, Bat. P5 USTL, F-59655 Villeneuve d’Ascq cedex, France

Abstract

The ultrashort femtosecond irradiation of silicate glasses containing silver nano particles was investigated at two wavelengths after ionic exchange. Glass samples were prepared by immersion in a molten salt bath (T = 320°C) composed of 10 % AgNO3-NaNO3 in molar concentration and for a part of them further annealed. This method is well known for silver substitution from the molten salt to the alkaline initially embedded in the glass as sodium [1-2-3]. The aim of our study is either to induce defects in the glass matrix for silver ionic exchanged samples with an exposure to a pulsed laser at λ=800nm in a non thermal regime, or to modify the particles shape and size by an irradiation at λ=410nm in a thermal regime by resonant absorption of silver nano particles [4-5-6-7]. In order to modify the glass structure it is necessary to excite simultaneously six electrons at λ=800nm ( Energy of 1.55eV) which is possible with the 42fs ultrashort pulse time [8]..

Keywords

Silver, Glass, Multiwavelength, Femtosecond laser.

Submitted at: March 3, 2011
Accepted at: Oct. 20, 2011

Citation

O. VERON, J.-P. BLONDEAU, B. CAPOEN, D. JEGOUSO, Glasses containing silver nano particles irradiated by ultrashort multi wavelength femtosecond laser, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 10, pp. 1235-1239 (2011)