Plasmon-assisted high reflectivity and strong magneto-optical Kerr effect in permalloy gratings
Date
2013-03-28
Authors
Kostylev, Nikita
Maksymov, Ivan S.
Adeyeye, Adekunle O.
Samarin, Sergey
Kostylev, Mikhail
Williams, Jim F.
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American Institute of Physics
Abstract
We demonstrate experimentally a strong plasmon-assisted enhancement of the transverse magneto-optical Kerr effect in permalloy gratings. The enhanced transverse magneto-optical Kerr effect is accompanied by an increased grating reflectivity with the maximum of enhancement being correlated with plasmonic Fano resonances. This correlation was confirmed by an intuitive Fano model and also through full-vectorial optical simulations. Simultaneously high reflectivity and transverse magneto-optical Kerr effect as well as narrowest ferromagnetic resonance linewidth and vanishing anisotropy make permalloy nanostructures attractive for applications in spintronics and nano-optics such as, for example, all-optical excitation of propagating spin waves and spectral tuning of optical nanoantennas.
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Keywords
Keywords: Ferromagnetic resonance linewidth; Grating reflectivity; High reflectivity; Magneto-optical Kerr effects; Optical simulation; Permalloy gratings; Permalloy nanostructures; Transverse magneto-optical kerr effects; Computer simulation; Nanophotonics; Optica
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Applied Physics Letters
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Journal article
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