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Title: Magnonic beam splitter: The building block of parallel magnonic circuitry

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.
Authors:
; ; ;  [1] ; ;  [2] ;  [1] ;  [3]
  1. Laboratory “Metamaterials,” Saratov State University, Saratov 410012 (Russian Federation)
  2. School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL (United Kingdom)
  3. (Russian Federation)
Publication Date:
OSTI Identifier:
22399045
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 19; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BRILLOUIN EFFECT; DEMAGNETIZATION; FERRITE GARNETS; LIGHT SCATTERING; MAGNONS; QUANTIZATION; SPIN WAVES; SURFACES; WAVE PROPAGATION; WAVEGUIDES; YTTRIUM COMPOUNDS