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

Journal Article · Mon May 19 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4878848· OSTI ID:22300219

Brächer, T. ^[1]; Pirro, P.; Meyer, T.; Heussner, F.; Lägel, B.; Serga, A. A.; Hillebrands, B. ^[1]

---

1. Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, D-67663 Kaiserslautern (Germany)

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.

• OSTI ID: 22300219
• Journal Information: Applied Physics Letters, Vol. 104, Issue 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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