Control of Diffracted Magneto-Optical Enhancement in Ni Gratings

TitleControl of Diffracted Magneto-Optical Enhancement in Ni Gratings
Publication TypeJournal Article
Year of Publication2008
AuthorsLu Y, Cho MH, Kim J, Lee Y, Rhee J, Lee JH
Journal TitleIeee Transactions on Magnetics
Date Published11
ISBN Number0018-9464
Accession NumberISI:000262221200218
Keywordsdiffraction, magneto-optical (mo) effect, magnetophotonic crystals, ni grating, photonic crystals

The so-called diffracted magneto-optical (MO) effects, in which the MO responses of diffracted beams are measured in the off-specular geometry, have been utilized to change the amplitude and the sign of MO signals. An enhancement of MO effect of the first-order diffraction was found. In this paper, the rigorous coupled-wave analysis implemented as Airy-like internal reflection series was developed to simulate the diffracted longitudinal MO Kerr effect. We demonstrate that the enhancement of the MO effect is controllable for a certain diffraction order by adjusting the geometrical parameters of Ni gratings. Furthermore, it is believed that the absolute magnitude and the MO enhancement can be more effectively tuned by designing the grating profile and carefully selecting the gyrotropic materials.

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