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Optical elements for anisotropic spin-wave propagation

: Vogel, M.; Pirro, P.; Hillebrands, B.; Freymann, Georg von


Applied Physics Letters 116 (2020), Nr.26, Art. 262404, 6 S.
ISSN: 0003-6951 (Print)
ISSN: 1077-3118
Deutsche Forschungsgemeinschaft DFG
SFB TRR 173; 268565370
Fraunhofer ITWM ()

We perform micromagnetic simulations to investigate the propagation of spin-wave beams through spin-wave optical elements. Despite spin-wave propagation in magnetic media being strongly anisotropic, we use axicons to excite spin-wave BesselGaussian beams and gradient-index lenses to focus spin waves in analogy to conventional optics with light in isotropic media. Moreover, we demonstrate spinwave Fourier optics using gradient-index lenses. Our results are valid for all three possible external magnetic field orientations and thus contribute to the growing field of spin-wave optics.