We present the experimental observation of the localized amplification of externally excited, propagating spin waves in a transversely in-plane magnetized Ni81Fe19 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.
References
1.
B.
Lenk
, H.
Ulrichs
, F.
Garbs
, and M.
Münzenberg
, Phys. Rep.
507
, 107
(2011
).2.
A. A.
Serga
, A. V.
Chumak
, and B.
Hillebrands
, J. Phys. D: Appl. Phys.
43
, 264002
(2010
).3.
R. L.
Stamps
, S.
Breitkreutz
, J.
Åkerman
, A. V.
Chumak
, Y.
Otani
, G. E. W.
Bauer
, J.-U.
Thiele
, M.
Bowen
, S. A.
Majetich
, M.
Kläui
, I. L.
Prejbeanu
, B.
Dieny
, N. M.
Dempsey
, and B.
Hillebrands
, J. Phys. D: Appl. Phys.
47
, 333001
(2014
).4.
T.
Schneider
, A. A.
Serga
, B.
Leven
, R. L.
Stamps
, M. P.
Kostylev
, and B.
Hillebrands
, Appl. Phys. Lett.
92
, 022505
(2008
).5.
A. A.
Serga
, A. V.
Chumak
, and B.
Hillebrands
, Nat. Commun.
5
, 4700
(2014
).6.
P.
Pirro
, T.
Brächer
, K.
Vogt
, B.
Obry
, H.
Schultheiss
, B.
Leven
, and B.
Hillebrands
, Phys. Status Solidi B
248
, 2404
(2011
).7.
K.-S.
Lee
and S.-K.
Kim
, J. Appl. Phys.
104
, 053909
(2008
).8.
T.
Sebastian
, Y.
Ohdaira
, T.
Kubota
, P.
Pirro
, T.
Brächer
, K.
Vogt
, A. A.
Serga
, H.
Naganuma
, M.
Oogane
, Y.
Ando
, and B.
Hillebrands
, Appl. Phys. Lett.
100
, 112402
(2012
).9.
P.
Pirro
, T.
Brächer
, A. V.
Chumak
, B.
Lägel
, C.
Dubs
, O.
Surzhenko
, P.
Görnert
, B.
Leven
, and B.
Hillebrands
, Appl. Phys. Lett.
104
, 012402
(2014
).10.
E.
Schlömann
, J. J.
Green
, and U.
Milano
, J. Appl. Phys.
31
, 386S
(1960
).11.
T.
Brächer
, P.
Pirro
, T.
Meyer
, F.
Heussner
, B.
Lägel
, A. A.
Serga
, and B.
Hillebrands
, Appl. Phys. Lett.
104
, 202408
(2014
).12.
V. E.
Demidov
, M. P.
Kostylev
, K.
Rott
, P.
Krzysteczko
, G.
Reiss
, and S. O.
Demokritov
, Appl. Phys. Lett.
95
, 112509
(2009
).13.
A. G.
Gurevich
and G. A.
Melkov
, Magnetization Oscillations and Waves
(CRC
, New York
, 1996
).14.
V. S.
L'vov
, Wave Turbulence under Parametric Excitation
(Springer-Verlag, Berlin
, Heidelberg
, 1994
).15.
K. R.
Smith
, V. I.
Vasyuchka
, M.
Wu
, G. A.
Melkov
, and C. E.
Patton
, Phys. Rev. B
76
, 054412
(2007
).16.
T.
Brächer
, P.
Pirro
, B.
Obry
, B.
Leven
, A. A.
Serga
, and B.
Hillebrands
, Appl. Phys. Lett.
99
, 162501
(2011
).17.
V. E.
Demidov
, S. O.
Demokritov
, B.
Hillebrands
, M.
Laufenberg
, and P. P.
Freitas
, Appl. Phys. Lett.
85
, 2866
(2004
).18.
D. D.
Stancil
and A.
Prabhakar
, Spin Waves—Theory and Applications
(Springer
, New York
, Berlin, Heidelberg, 2009
).19.
T.
Brächer
, P.
Pirro
, F.
Heussner
, A. A.
Serga
, and B.
Hillebrands
, Appl. Phys. Lett.
104
, 092418
(2014
).© 2014 AIP Publishing LLC.
2014
AIP Publishing LLC
You do not currently have access to this content.