Dependence of the Refractive Indices in LiNbO3:Cr Crystals Doped with HfO2


Article Preview

The dependence of the refractive indices, absorption edge and optical damage in congruent HfO2-doped LiNbO3 crystal are reported. A small amount of Cr3+ ions (0.1 mol%) was introduced in the doped crystals as optical probe. The experimental data indicates that the extraordinary and ordinary indices depend on the Hf4+ ions concentration showing a singularly for a dopant level of ~ 2.7 mol%. The dependence of the absorption edge also shows a transition region at this Hf4+concentration. The distortion of the transmitted light through samples doped with different concentrations of Hf4+ ions indicates that an inhibition of optical damages is achieved at above 3 mol% of dopant. A charge compensation mechanism is proposed to explain the role of the Hf4+ ions for the observed experimental result.



Materials Science Forum (Volumes 480-481)

Edited by:

A. Méndez-Vilas




E. Cantelar et al., "Dependence of the Refractive Indices in LiNbO3:Cr Crystals Doped with HfO2", Materials Science Forum, Vols. 480-481, pp. 423-428, 2005

Online since:

March 2005




[1] L. Arizmendi, Phys. Stat. Sol. (2003) in press.

[2] D. Jaque, J. A. Sanz-García, J, Capmany , J. García-Sole: Appl. Phys. B. Vol. 70 (2000), p.483.

[3] R. E. di Paolo, E. Cantelar, J.A. Sanz-García, P. Pernas, G. Lifante and F. Cussó: Appl. Phys. Lett. Vol. 79 (2001), p.4088.

[4] T.R. Volk, M. Wohlecke, A. Reichert, F. Jermann and N. Rubinina: Ferroelectrics Letter Vol. 20 (1995), p.97.

[5] F. Jaque, T.P.J. Han and G. Lifante: J. Lumin. Vol. 102 (2003), p.248.

[6] J. Díaz-Caro, J. García-Solé, D. Bravo, J.A. Sanz-García, F.J. López and F. Jaque: Phys, Rev. B Vol. 54 (1996), p.13042.

[7] G.A. Torchia, J.O. Tocho and F. Jaque: J. Phys. Chem. of Solid. Vol. 65 (2002), p.555.

[8] F. Jaque, T.P.J. Han, V. Bermúdez and E. Diéguez: J. Lumin. Vol. 102 (2003), p.253.

[9] R. Nevado and G. Lifante: J. Opt. Soc. Am. A Vol. 16 (1999), p.2574.