DUSSAUZE, Marc; BIDAULT, Olivier; FARGIN, Evelyne; MAGLIONE, Mario; RODRIGUEZ, Vincent

doi:10.1063/1.2218998

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DUSSAUZE, Marc
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

BIDAULT, Olivier
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

FARGIN, Evelyne
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Journal of Applied Physics. 2006, vol. 100, n° 3, p. 034905/1-7

American Institute of Physics

Résumé en anglais

Unpoled 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.< Réduire

Mots clés en anglais

Niobates

Glasses

Polarization and depolarization

Dielectric breakdown and space-charge effects

Heat and thermomechanical treatments

PZT ceramics

Dielectric loss and relaxation

tantalates

titanates

quartz

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

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