We present parallel parametric amplification of coherently excited, propagating spin waves in a microstructured magnonic Ni81Fe19 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.
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19 May 2014
Research Article|
May 21 2014
Parallel parametric amplification of coherently excited propagating spin waves in a microscopic Ni81Fe19 waveguide
T. Brächer;
T. Brächer
1Fachbereich Physik and Landesforschungszentrum OPTIMAS,
Technische Universität Kaiserslautern
, D-67663 Kaiserslautern, Germany
2Graduate School Materials Science in Mainz, Gottlieb-Daimler-Strasse 47, D-67663 Kaiserslautern,
Germany
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P. Pirro;
P. Pirro
1Fachbereich Physik and Landesforschungszentrum OPTIMAS,
Technische Universität Kaiserslautern
, D-67663 Kaiserslautern, Germany
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T. Meyer;
T. Meyer
1Fachbereich Physik and Landesforschungszentrum OPTIMAS,
Technische Universität Kaiserslautern
, D-67663 Kaiserslautern, Germany
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F. Heussner;
F. Heussner
1Fachbereich Physik and Landesforschungszentrum OPTIMAS,
Technische Universität Kaiserslautern
, D-67663 Kaiserslautern, Germany
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B. Lägel;
B. Lägel
1Fachbereich Physik and Landesforschungszentrum OPTIMAS,
Technische Universität Kaiserslautern
, D-67663 Kaiserslautern, Germany
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A. A. Serga;
A. A. Serga
1Fachbereich Physik and Landesforschungszentrum OPTIMAS,
Technische Universität Kaiserslautern
, D-67663 Kaiserslautern, Germany
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B. Hillebrands
B. Hillebrands
1Fachbereich Physik and Landesforschungszentrum OPTIMAS,
Technische Universität Kaiserslautern
, D-67663 Kaiserslautern, Germany
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Appl. Phys. Lett. 104, 202408 (2014)
Article history
Received:
April 15 2014
Accepted:
May 08 2014
Citation
T. Brächer, P. Pirro, T. Meyer, F. Heussner, B. Lägel, A. A. Serga, B. Hillebrands; Parallel parametric amplification of coherently excited propagating spin waves in a microscopic Ni81Fe19 waveguide. Appl. Phys. Lett. 19 May 2014; 104 (20): 202408. https://doi.org/10.1063/1.4878848
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