Dielectric relaxation induced by a space charge in poled glasses for nonlinear optics | Zendy

Marc Dussauze | Zendy; O. Bidault | Zendy; Evelyne Fargin | Zendy; Mario Maglione | Zendy; Vincent Rodriguez | Zendy

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Dielectric relaxation induced by a space charge in poled glasses for nonlinear optics

Author(s) -

Marc Dussauze,

O. Bidault,

Evelyne Fargin,

Mario Maglione,

Vincent Rodriguez

Publication year - 2006

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.2218998

Subject(s) - poling , dielectric , materials science , relaxation (psychology) , conductivity , dielectric spectroscopy , space charge , condensed matter physics , nonlinear optics , second harmonic generation , nonlinear system , niobium , optics , optoelectronics , chemistry , ferroelectricity , physics , electrochemistry , laser , psychology , social psychology , electrode , quantum mechanics , metallurgy , electron

International audienceUnpoled and efficient nonlinear optical (NLO) poled sodium niobium borophosphate glasses have been studied by means of dielectric spectroscopy. The thermal poling process induces a dielectric relaxation that gradually vanishes on heating for T>~500 K. The data are interpreted by a two-layer (Maxwell-Wagner) model, consisting of a bulk and a Na+ poor surface layer with lower conductivity. Our results suggest that the ion transport is due to hopping mechanism implying at least Na+. All the dielectric results are in full agreement with previous optical analyses. This is an example of poled glasses where an efficient NLO response is directly correlated to the conductivity of the material enhanced by a high alkali loading

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