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arXiv · 1807.11754

Fresnel diffraction of spin waves

Nicolás Loayza·Matthias Benjamin Jungfleisch·Axel Hoffmann·Matthieu Bailleul·Vincent Vlaminck
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Abstract

The propagation of magnetostatic forward volume waves excited by a constricted coplanar waveguide is studied via inductive spectroscopy techniques. A series of devices consisting of pairs of sub-micrometer size antennae is used to perform a discrete mapping of the spin wave amplitude in the plane of a 30-nm thin YIG film. We found that the spin wave propagation remains well focused in a beam shape of width comparable to the constriction length and that the amplitude within the constriction displays oscillations, two features which are explained in terms of near-field Fresnel diffraction theory.

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Nicolás Loayza, Matthias Benjamin Jungfleisch, Axel Hoffmann, Matthieu Bailleul, Vincent Vlaminck. 2018-07-31. Fresnel diffraction of spin waves. https://doi.org/10.1103/physrevb.98.144430

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