Science des Procédés Céramiques et de Traitements de Surface (SPCTS)

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Centre National de la Recherche Scientifique (CNRS)
Université de Limoges
Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)


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Accueil du site > Axes de recherche > Axe 3 "Organisation structurale multiéchelle des matériaux" > Matériaux à base de TeO2 pour l’optique non linéaire > TeO2-based materials for non linear optics

TeO2-based materials for non linear optics

Contact

Philippe THOMAS : philippe.thomas unilim.fr


Context/objectives

TeO2-based materials possess structural peculiarities originating from the individual electron configuration of Te atoms involving a lone electron pair. Our group is interested in the structure and properties of these tellurite materials, in crystalline, disordered or glassy compounds. Among them, the TeO2- based glasses are of special scientific interest because of their non linear optical properties : they have the highest non linear optical susceptibilities (χ3) among the different oxide glasses, from 20 to 50 times higher than that of silica.

 
Projection on the c axis of the RMC simulation “box” of the Bi2Te4O11 disordered phase (insert : average structure)   Difference of electron density with and without electric field along the z axis of α-TeO2


Activities

  • Exploration of binary or ternary systems such as : TeO2-Tl2O, TeO2-WO3, TeO2-Nb2O5, TeO2-PbO, TeO2-Ga2O3, TeO2-Tl2O-PbO, TeO2-Tl2O-Bi2O3... (Crystallized and glassy phases).
  • Structural studies of ordered or disordered compounds (glass, metastable phases…) using experimental techniques and modeling methods (reverse Monte Carlo-like).
  • Optical properties : measurement and prediction of non linear optical susceptibilities (Density Functional Theory).
  • Second Harmonic Generation (Thermal poling or induced by laser irradiation).


Key facts

  1. D. LINDA, M. DUTREILH-COLAS, D. HAMANI, P. THOMAS, A. MIRGORODSKY, J.R. DUCLERE, O. MASSON, M. LOUKIL, A. KABADOU
    New glasses within the Tl2O-Ag2O-TeO2 system : thermal characteristics, Raman spectra and structural properties
    Mat. Res. Bull., (2010), 45, 1816-1824

  2. M. BEN YAHIA, E. ORHAN, A. BELTRAN FLORS, O. MASSON, T. MERLE-MEJEAN, A. MIRGORODSKY, P. THOMAS
    Theoretical third order hyperpolarisability of paratellurite from finite field perturbation method
    The J. of Physical Chemistry B, (2008), 112, 10777-10781

  3. N. BERKAINE, E. ORHAN, O. MASSON, P. THOMAS, J. JUNQUERA
    Nonlinear optical properties of TeO2 crystalline phases from first principles
    Phys. Rev. B, (2011), 83, 245205-1 - 245205-10

  4. D. HAMANI, A. MIRGORODSKY, O. MASSON, T. MERLE MÉJEAN, M. COLAS, M. SMIRNOV, P. THOMAS
    Crystal chemistry peculiarities of Cs2Te4O12
    J. Solid State Chem., (2011), 184, 637-643

Updated April 4, 2012

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