Parametric generation of forward and phase-conjugated spin-wave bullets in magnetic films.
We show experimentally as well as by numerical simulation that interaction of a linear two-dimensional spin-wave packet with quasiuniform pulsed pumping leads to the formation of strongly self-focused nonlinear spin-wave bullets propagating in both forward and reversed directions. The focusing of the reversed, phase-conjugated wave bullet is stronger than that of the forward one, because not only the nonlinear four-wave self-focusing effect but also linear focusing due to two-dimensional phase conjugation contributes to the focusing of the reversed bullet.
Serga
A A
AA
Fachbereich Physik, Technische Universität Kaiserslautern, Kaiserslautern, Germany.
Hillebrands
B
B
Demokritov
S O
SO
Slavin
A N
AN
Wierzbicki
P
P
Vasyuchka
V
V
Dzyapko
O
O
Chumak
A
A