Magneto-optical nanoparticle-doped silica-titania planar waveguides

Royer, F.; Jamon, D.; Rousseau, J. J.; Roux, H.; Zins, D.; Cabuil, V.
January 2005
Applied Physics Letters;1/3/2005, Vol. 86 Issue 1, p011107
Academic Journal
This letter describes how composite material, made of maghemite (γ-Fe2O3) nanoparticles embedded in a silica/titania matrix, can be used to develop new magneto-optical planar waveguides. Thin film samples are coated on Pyrex™ substrates from a magnetic particles doped sol-gel preparation. M-lines spectroscopy measurements performed on these samples show that an out of plane magnetic field applied during the gelation induces a decrease of the planar waveguide phase mismatch. Free space measurements evidence the Faraday rotation of the films up to 25°/cm at 633 nm. Improvements and leads of further works are proposed in term of magneto-optical waveguide applications.


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