Anomalous Refraction of Spin Waves as a Way to Guide Signals in Curved Magnonic Multimode Waveguides

@article{Mieszczak2020AnomalousRO,
  title={Anomalous Refraction of Spin Waves as a Way to Guide Signals in Curved Magnonic Multimode Waveguides},
  author={Szymon Mieszczak and Oksana Busel and Paweł Gruszecki and A. N. Kuchko and Jarosław W. Kłos and Maciej Krawczyk},
  journal={arXiv: Applied Physics},
  year={2020}
}
We present a method for efficient spin wave guiding within the magnonic nanostructures. Our technique is based on the anomalous refraction in the metamaterial flat slab. The gradual change of the material parameters (saturation magnetization or magnetic anisotropy) across the slab allows tilting the wavefronts of the transmitted spin waves and controlling the refraction. Numerical studies of the spin wave refraction are preceded by the analytical calculations of the phase shift acquired by the… Expand

Figures from this paper

Resonant subwavelength control of the phase of spin waves reflected from a ferromagnetic film edge
Using frequency-domain finite element calculations cross-checked with micromagnetic simulations, we demonstrate that the phase of spin waves reflected from an interface between a permalloy film and aExpand
Resonant subwavelength control of the phase of spin waves reflected from a Gires–Tournois interferometer
TLDR
This work demonstrates a fully magnonic Gires–Tournois interferometer based on a subwavelength resonator made of a narrow ferromagnetic stripe lying above the edge of aFerromagnetic film and demonstrates spin-wave phase manipulation capabilities, a prerequisite for the design of spin- wave metasurfaces and may stimulate development of magnonic logic devices and sensors detecting magnetic nanoparticles. Expand
Applications of nanomagnets as dynamical systems: II
TLDR
This part of this topical review addresses mostly wave-like phenomena in nanomagnets, with emphasis on spin waves in myriad nanomagnetic systems and methods of controlling magnetization dynamics in Nanomagnet arrays which may have analog applications. Expand
Control of the phase of reflected spin-waves from magnonic Gires-Tournois interferometer of subwavelength width
The phase is one of the fundamental properties of a wave that allows to control interference effects and can be used to efficiently encode information. We examine numerically a magnonic resonator ofExpand
Spin-wave transmission through an internal boundary: Beyond the scalar approximation
The transmission and reflection of a spin wave at an internal boundary created by the local variation of anisotropy (or a bias magnetic field) are studied taking into account not only the changes inExpand

References

SHOWING 1-10 OF 69 REFERENCES
Propagation and scattering of spin waves in curved magnonic waveguides
We report a continuous medium theory of dispersion and scattering of spin waves propagating in thin nanowire magnonic waveguides with curved regions. Assuming that the static magnetization is alignedExpand
Spin-wave beam propagation in ferromagnetic thin films with graded refractive index: Mirage effect and prospective applications
Using analysis of iso-frequency contours of the spin-wave dispersion relation, supported by micromagnetic simulations, we study the propagation of spin-wave (SW) beams in thin ferromagnetic filmsExpand
Spin waves turning a corner
We studied the propagation of spin waves in a Ni81Fe19 micro-waveguide comprising a smooth, S-shaped bend using Brillouin light scattering microscopy. A direct current flowing through a gold wireExpand
All-optical detection of phase fronts of propagating spin waves in a Ni81Fe19 microstripe
We present the determination of the wavelength and phase of propagating spin waves in magnetic microstructures made of Ni81Fe19 using the shorted end of a coplanar waveguide for local excitation. TheExpand
Light Propagation with Phase Discontinuities: Generalized Laws of Reflection and Refraction
Light propagation can be controlled with plasmonic interfaces that introduce abrupt phase shifts along the optical path. Conventional optical components rely on gradual phase shifts accumulatedExpand
Mode conversion by symmetry breaking of propagating spin waves
We study spin-wave transport in a microstructured Ni81Fe19 waveguide exhibiting broken translational symmetry. We observe the conversion of a beam profile composed of symmetric spin-wave width modesExpand
Spin Pinning and Spin-Wave Dispersion in Nanoscopic Ferromagnetic Waveguides.
TLDR
A critical width is found, below which the exchange interaction suppresses the dipolar pinning phenomenon and changes the quantization criterion for thespin-wave eigenmodes and results in a pronounced modification of the spin-wave characteristics. Expand
Excitation of short-wavelength spin waves in magnonic waveguides
By using phase-resolved micro-focus Brillouin light scattering spectroscopy, we demonstrate experimentally a phenomenon of wavelength conversion of spin waves propagating in tapered PermalloyExpand
The switching of strong spin wave beams in patterned garnet films
TLDR
This work proposes a realization of a strong SW switchers based on a patterned yttrium iron garnet (YIG) film that could serve as a magnonic fundamental building block and demonstrates unique features of the propagation of microwave-excited SW beams. Expand
Reconfigurable heat-induced spin wave lenses
We study the control and manipulation of propagating spin waves in yttrium iron garnet films using a local laser-induced heating. We show that, due to the refraction of spin waves in the thermalExpand
...
1
2
3
4
5
...