CO2 laser-induced precipitation of CdSxSe1−x nanoparticles in a borosilicate glass: A new approach for the localized growth of quantum dots

Christophe Kinowski (1) , Odile Cristini-Robbe (1) , Remy Bernard (1) , Hicham El Hamzaoui (1) , L. Boussekey (2) , Mohamed Bouazaoui (1) , Bruno Capoen (1)

1 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523
2 LASIRE - Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516

A novel method allowing the local growth of semiconductor nanoparticles in dense silicate glasses is presented. In this method combining a continuous middle-infrared laser irradiation and a heat-treatment in open air, a transparent melt-quenched borosilicate glass containing CdSxSe1−x nanocrystals was annealed at a temperature below the softening point. Simultaneously, a continuous infrared laser irradiation at 10.6 μm was applied, acting as a thermal addition. Resonant Raman, photoluminescence and absorption spectra reveal the local growth of CdSxSe1−x nanoparticles, with a homogeneous composition and average particle radii ranging from 1.9 to 5.5 nm. These results demonstrate the feasibility of coupling a laser irradiation with an appropriate heat-treatment in order to achieve the spatial organization of nanostructures in vitreous materials.

Domaines: Optique [physics.optics]

Christophe Kinowski, Odile Cristini-Robbe, Remy Bernard, Hicham El Hamzaoui, L. Boussekey, et al.. CO2 laser-induced precipitation of CdSxSe1−x nanoparticles in a borosilicate glass: A new approach for the localized growth of quantum dots. Optical Materials, 2015, 42, pp.331-334. ⟨10.1016/j.optmat.2015.01.023⟩. ⟨hal-01116974⟩