Glass structure and optical nonlinearities in thallium(I) tellurium (IV) oxide glasses

Journal Article · Wed Sep 01 04:00:00 EDT 1999 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1999.8355· OSTI ID:696668

Jeansannetas, B; Blanchandin, S; Thomas, P ^[1]

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1. ESA CNRS, Limoges (France). Lab. de Materiaux Ceramiques et Traitements de Surface; and others

The relationships between structure and nonlinear optical response at 1.5 {micro}m in thallium(I) tellurite glasses are investigated. Usually in tellurite glasses, the introduction of a modifier ion changes the basic structural TeO{sub 4} disphenoid entity progressively into a TeO{sub 3} trigonal bipyramid via an intermediate TeO{sub 3+1} polyhedron. This evolution leads to a decrease of the nonlinear refractive index n{sub 2}. Nevertheless, if a modifier ion such as Tl{sup +} also has an ns{sup 2} lone electron pair, n{sub 2} increases although the same structural evolution is observed around the tellurium atoms. This result is related to the hyperpolarizability of the thallium oxygen entities, which has been evidenced by the structural study of both thallium(I) tellurite crystals and glasses of the same compositions. With this solid state chemistry approach, the highest nonlinear refractive index measured at 1.5 {micro}m (n{sub 2} = 9.10{sup {minus}19} m{sup 2}/W) and reported in oxide glasses has been obtained.

• OSTI ID: 696668
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 146; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATOMIC MODELS
CHEMICAL COMPOSITION
EXPERIMENTAL DATA
GLASS
MOLECULAR STRUCTURE
MOLECULES
OPTICAL PROPERTIES
RAMAN SPECTRA
TELLURIUM OXIDES
THALLIUM OXIDES