MAGLIONE, Mario; THEERTHAN, Anand; RODRIGUEZ, Vincent; PENA, Alexandra; CANALIAS, Carlota; MÉNAERT, Bertrand; BOULANGER, Benoit

doi:10.1364/OME.6.000137

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MAGLIONE, Mario
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

THEERTHAN, Anand
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

RODRIGUEZ, Vincent
Institut des Sciences Moléculaires [ISM]

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Optical Materials Express. 2016, vol. 6, n° 1, p. 137-145

OSA pub

Resumen en inglés

Mobile charges and lattice polarization interact in ferroelectric materials because of the Coulomb interaction between the mobile free charges and the fixed lattice dipoles. We have investigated this mutual screening in KTiOPO4, a ferroelectric/superionic single crystal in which the mobile charges are K+ ions. The ionic accumulation close to the crystal surfaces leads to orders of magnitude increase of the Second Harmonic Generation. This ionic space charge model is supported by the absence of such an effect in non-ionic conductor but ferroelectric BaTiO3, by its temperature dependence in KTiOPO4 and by its broad depletion at domain walls.< Leer menos

DOI

http://dx.doi.org/10.1364/OME.6.000137

Proyecto ANR

Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003

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Centros de investigación

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026