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Magneto-optical parameters of Co90Fe10 and Co50Fe50 ferromagnetic thin films for 1.3 μm integrated isolator |
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| Authors: | A. Lesuffleur M. Vanwolleghem P. Gogol B. Bartenlian P. Beauvillain J. Harmle L. Lagae J. Pistora K. Postava S. Visnovsky R. Wirix-Speetjens |
| Affiliation: | 1. Institut d’Electronique Fondamentale, UMR CNRS 8622, Université Paris-Sud, Orsay, France;2. Physic Institute, Charles University, Praha, Czech Republic;3. Interuniversitair Micro-Elektronica Centrum IMEC vzw, Leuven, Belgium;4. Institut de Metallurgy, Ostrava University, Czech Republic |
| Abstract: | In order to optimize a 1.3 μm integrated optical isolator using a CoFe alloy for the non-reciprocal magneto-optical (MO) transverse Kerr effect, we have measured the optical and magneto-optical indices of Co90Fe10 and Co50Fe50 alloys grown in the Al2O3/Al/CoFe/GaAs multilayer structure. The optical reflectivity and MO rotation and ellipticity measurements were performed at variable incidence angle and s and p polarization of the incident light. In order to determine the optical and MO indices, the experimental data were fitted using a Matlab implementation of a standard multilayer Yeh formalism including multiple reflections. This original procedure allows precise determination of the optical and MO indices of CoFe alloys. |
| Keywords: | Magneto-optical properties Ferromagnetic materials Ellipsometry |
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