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Title: Parallel parametric amplification of coherently excited propagating spin waves in a microscopic Ni{sub 81}Fe{sub 19} waveguide

We present parallel parametric amplification of coherently excited, propagating spin waves in a microstructured magnonic Ni{sub 81}Fe{sub 19} waveguide. Amplification is achieved by the pumping field generated by a microwave current flowing through a Cu micro-stripline underneath the waveguide. By employing microfocussed Brillouin light scattering spectroscopy, we investigate the spatial decay of the propagating spin waves and their amplification by means of parallel pumping. We analyze the dependence of the intensity of the amplified spin waves on the spin-wave excitation power, pumping power, and pumping duration, revealing the most efficient working point for a noise-free amplification. This paves the way for a frequency selective amplification of spin waves in microstructured magnonic circuits.
Authors:
 [1] ;  [2] ; ; ; ; ; ;  [1]
  1. Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, D-67663 Kaiserslautern (Germany)
  2. (Germany)
Publication Date:
OSTI Identifier:
22300219
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AMPLIFICATION; CURRENTS; EXCITATION; IRON ALLOYS; LIGHT SCATTERING; MICROSTRUCTURE; MICROWAVE RADIATION; NICKEL ALLOYS; NOISE; PUMPING; SPECTROSCOPY; SPIN WAVES; WAVE PROPAGATION; WAVEGUIDES