Dependence of the refractive indices in LiNbO3:Cr crystals doped with HfO2

E. Cantelar, G.A. Torchia, V. Bermudez, D. Jaque, J.A. Sanz-Garcia, G. Lifante, T.P.J. Han, F. Jaque

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2 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)423-428
Number of pages6
JournalMaterials Science Forum
Publication statusPublished - Mar 2005


  • absorption coefficients
  • charge compensation
  • chromium
  • doping profiles
  • hafnium compounds
  • impurity distribution
  • lithium compounds
  • refractive index

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