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Title: Time- and power-dependent operation of a parametric spin-wave amplifier

We present the experimental observation of the localized amplification of externally excited, propagating spin waves in a transversely in-plane magnetized Ni{sub 81}Fe{sub 19} magnonic waveguide by means of parallel pumping. By employing microfocussed Brillouin light scattering spectroscopy, we analyze the dependency of the amplification on the applied pumping power and on the delay between the input spin-wave packet and the pumping pulse. We show that there are two different operation regimes: At large pumping powers, the spin-wave packet needs to enter the amplifier before the pumping is switched on in order to be amplified while at low powers the spin-wave packet can arrive at any time during the pumping pulse.
Authors:
; ; ; ; ; ; ; ;  [1]
  1. Fachbereich Physik and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, D-67663 Kaiserslautern (Germany)
Publication Date:
OSTI Identifier:
22395484
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 23; Other Information: (c) 2014 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; AMPLIFICATION; AMPLIFIERS; BRILLOUIN EFFECT; INTERMETALLIC COMPOUNDS; IRON; LIGHT SCATTERING; NICKEL; OPERATION; PULSES; PUMPING; SPECTROSCOPY; SPIN WAVES; SWITCHES; WAVE PACKETS; WAVEGUIDES