Induced changes in the refractive index of LiNbO3 crystals through Sc2O3 doping

• Published in: Materials letters Vol. 52; no. 1-2; pp. 1 - 4
• Main Authors: NEVADO, R, CAMARILLO, E, BRAVO, D, AGUIRRE DE CARCER, I, LIFANTE, G, JAQUE, F
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier 2002
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity); Optical constants: refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Physics; SC lattices; Singularity; Impurity density; ESR; Ternary compounds; Refractive index; Doping; Impurity site; Experimental study; Scandium additions; Lithium Niobates; Defects
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/S0167-577X(01)00354-8

The dependence of the ordinary (no) and extraordinary (ne) refractive indices in congruent Sc2O3-doped LiNbO3 crystals is reported. The Sc3+ ion concentrations in the crystals were varied from 0% to 7%. It was found that no shows a clear singularity for a Sc3+ ion concentration of 3%. The experimental data of no and ne are described by a generalized Sellmeier equation, which takes into account different Sc3+ ions sites location in the host matrix. Additionally, the role of the Sc2O3 content in the intrinsic defect distribution in LiNbO3 crystals was studied by using Cr3+ ions as an EPR probe. 7 refs.