Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 5, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3079094
Keywords
annealing; birefringence; cobalt compounds; dip coating; ellipsometry; Faraday effect; ferrites; magnetic particles; magneto-optical devices; nanoparticles; optical planar waveguides; organic-inorganic hybrid materials; refractive index; silicon compounds; sol-gel processing; thin films; zirconium compounds
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This paper describes a way to develop magneto-optical waveguides via sol-gel process. They are made of cobalt ferrite nanoparticles embedded in a silica/zirconia matrix. Thin films are coated on glass substrate using the dip-coating technique. Annealing and UV treatment are applied to finalize sample preparation. Therefore, planar waveguides combining magneto-optical properties with a low refractive index (approximate to 1,5) are obtained. M-lines and free space ellipsometry measurements show a specific Faraday rotation of 250 degrees/cm and a modal birefringence of 1x10(-4) at 820 nm. Thus, the mode conversion efficiency can reach a maximum value around 56%.
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