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Closed Access item Luminescence properties of thin films prepared by laser ablation of Nd-doped potassium gadolinium tungstate

Authors:Atanasov, P. A.
Perea, Ángel
Castro, M. J. de
Chaos, J. A.
Gonzalo de los Reyes, José
Afonso, Carmen N.
Perriére, J.
Issue Date:2002
Citation:Applied Physics A: Materials Science and Processing 74: 109- 113 (2002)
Abstract:Optically active thin films on Si substrates have been produced by laser ablation of a Nd-doped potassium gadolinium tungstate (Nd:KGW) single crystal. Films grown at low oxygen pressures (< 0.6 mbar) are potassium-deficient and appear to be mainly disordered. They show a poor photoluminescence (PL) performance that improves upon annealing in air at temperatures in the range 700-1000 °C. Films grown at high oxygen pressure (1 mbar) show instead good stoichiometry and the presence of a dominant textured gadolinium-tungstate phase compared to KGW. These films have low absorption, a refractive index close to that of bulk KGW and good PL performance, the emission lifetimes being longer (τ > 150 μs) under certain conditions than those measured in the single-crystal material. © Springer-Verlag 2001.
Identifiers:doi: 10.1007/s003390100975
issn: 0947-8396
Appears in Collections:(CFMAC-IO) Artículos

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