POIRIER, Gael; DUSSAUZE, Marc; RODRIGUEZ, Vincent; ADAMIETZ, Frédéric; KARAM, Lara; CARDINAL, Thierry; FARGIN, Evelyne

doi:10.1021/acs.jpcc.9b08221

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POIRIER, Gael
Grupo de Química de Materiais

DUSSAUZE, Marc
Institut des Sciences Moléculaires [ISM]

RODRIGUEZ, Vincent
Institut des Sciences Moléculaires [ISM]

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Journal of Physical Chemistry C. 2019, vol. 123, n° 43, p. 26528-26535

American Chemical Society

Resumen en inglés

Structure, linear and nonlinear optical properties of glasses in the ternary system (90–x)GeO2–10Na2O–xTa2O5 have been investigated. These glasses exhibit a wide transparency window from 350 to 5500 nm and refractive index ranging from 1.78 to 1.93. Upon a thermal poling treatment under nitrogen atmosphere using increasing poling voltages, second harmonic generation (SHG) quantitative measurements were performed and have confirmed the electro-optical origin of the second-order optical responses; χ(2) values ranging from 0.06 to 0.3 pm/V were obtained, depending on the poling conditions and glass composition. SHG/Raman correlated microscopy measurements allowed identification of the structural changes within the poled layer and pointed out that sodium depletion led to a more connected glass network through cross-linking bonds such as Ge–O–Ge and Ta–O–Ta bonds. A deviation from a pure electro-optical second-order response is observed for the highest poling voltage. In this particular case, a linear optical birefringence and a structural χ(2) might have to be taken into account to describe accurately the polarized layer optical properties.< Leer menos

DOI

http://dx.doi.org/10.1021/acs.jpcc.9b08221

Proyecto ANR

ImPRession laser de fibres exOtiques Multi-MaTEriaux - ANR-17-CE08-0042

Orígen

Importado de Hal

Centros de investigación

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