Sub-micrometer near-field focusing of spin waves in ultrathin YIG films
arXiv:2002.04284 · doi:10.1063/1.5131689
Abstract
We experimentally demonstrate tight focusing of a spin wave beam excited in extended nanometer-thick films of Yttrium Iron Garnet by a simple microscopic antenna functioning as a single-slit near-field lens. We show that the focal distance and the minimum transverse width of the focal spot can be controlled in a broad range by varying the frequency/wavelength of spin waves and the antenna geometry. The experimental data are in good agreement with the results of numerical simulations. Our findings provide a simple solution for implementation of magnonic nano-devices requiring local concentration of the spin-wave energy.
References in corpus (8)
- The design and verification of Mumax3
- Inverse Spin Hall Effect in nanometer-thick YIG/Pt system
- Spin pinning and spin-wave dispersion in nanoscopic ferromagnetic waveguides
- A Luneburg lens for spin waves
- Epitaxial patterning of nanometer-thick Y3Fe5O12 films with low magnetic damping
- Microwave excitation of spin wave beams in thin ferromagnetic films
- Fresnel diffraction of spin waves
- Nonreciprocal nano-optics with spin-waves in synthetic antiferromagnets