Refractive index distribution in the non-linear optical layer of thermally poled oxide glasses

Marc Dussauze (1) , Efstratios I. Kamitsos (1) , Evelyne Fargin (2) , Vincent Rodriguez (3)

1 Theoretical and Physical Chemistry Institute
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
3 ISM - Institut des Sciences Moléculaires

Large refractive index variations have been recorded by combining micro-infrared reflectance spectroscopy with simulations of interference fringes measured at the anode side of thermally poled sodium-rich boro-phosphate–niobate glasses. The method developed in this work is effective for probing the spatial distribution and depth-profile of refractive index in the non-linear optical layer. It was found that the refractive index decreases and the molar volume increases with thermal poling, leading to a net increase in molecular electronic polarizability in the non-linear optical layer of the poled glass.

Mots clés: Poled glasses; Oxides; Non-linear optic

Domaines: Matériaux

Marc Dussauze, Efstratios I. Kamitsos, Evelyne Fargin, Vincent Rodriguez. Refractive index distribution in the non-linear optical layer of thermally poled oxide glasses. Chemical Physics Letters, 2009, 470 (1-3), pp.63-66. ⟨10.1016/j.cplett.2009.01.007⟩. ⟨hal-00382206⟩