New technological approach in phase-matched magneto-optic planar waveguide realization

This paper describes how composite material, made of maghemite (γFe2O3) nanoparticles embedded in a silica/titania matrix, can be used to developp new phase matched magnetooptic planar waveguides. Thin film samples are coated on pyrex substrates from a magnetic particles doped sol-gel preparation and using the dip-coating technic. Ellipsometry and Mlines spectroscopy measurements performed on these samples show that a magnetic field applied during the gelation induces an optical anisotropy in the film. Depending on the orientation of the field (in plane or out of plane), the TE0-TM0 planar waveguide phase mismatch is increased or reduced. Interpretations of these results are given and leads of further works using this property are proposed.

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