Magnonic beam splitter: The building block of parallel magnonic circuitry

Journal Article · Mon May 11 04:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4921206· OSTI ID:22399045

Sadovnikov, A. V.; Romanenko, D. V.; Sharaevskii, Yu. P. ^[1]; Davies, C. S.; Kruglyak, V. V. ^[2]; Nikitov, S. A. ^[1]

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1. Laboratory “Metamaterials,” Saratov State University, Saratov 410012 (Russian Federation)
2. School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL (United Kingdom)

We demonstrate a magnonic beam splitter that works by inter-converting magnetostatic surface and backward-volume spin waves propagating in orthogonal sections of a T-shaped yttrium iron garnet structure. The inter-conversion is enabled by the overlap of the surface and volume spin wave bands. This overlap results from the demagnetising field induced along the transversely magnetised section(-s) of the structure and the quantization of the transverse wave number of the propagating spin waves (which are therefore better described as waveguide modes). In agreement with numerical micromagnetic simulations, our Brillouin light scattering imaging experiments reveal that, depending on the frequency, the incident fundamental waveguide magnonic modes may also be converted into higher order waveguide modes. The magnonic beam splitter demonstrated here is an important step towards the development of parallel logic circuitry of magnonics.

• OSTI ID: 22399045
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 19 Vol. 106; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BRILLOUIN EFFECT
DEMAGNETIZATION
FERRITE GARNETS
LIGHT SCATTERING
MAGNONS
QUANTIZATION
SPIN WAVES
SURFACES
WAVE PROPAGATION
WAVEGUIDES
YTTRIUM COMPOUNDS