Deeply nonlinear excitation of self-normalized short spin waves
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Date
2023-08-01
Authors
Wang, Qi
Verba, Roman
Heinz, Björn
Schneider, Michael
Wojewoda, Ondřej
Davídková, Kristýna
Levchenko, Khrystyna
Dubs, Carsten
Mauser, Norbert J.J.
Urbánek, Michal
0000-0002-4276-520XAdvisor
Referee
Mark
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AMER ASSOC ADVANCEMENT SCIENCE
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Abstract
Spin waves are ideal candidates for wave-based computing, but the construction of magnetic circuits is blocked by a lack of an efficient mechanism to excite long-running exchange spin waves with normalized amplitudes. Here, we solve the challenge by exploiting a deeply nonlinear phenomenon for forward volume spin waves in 200-nm-wide nanoscale waveguides and validate our concept using microfocused Brillouin light scattering spectroscopy. An unprecedented nonlinear frequency shift of more than 2 GHz is achieved, corresponding to a magnetization precession angle of 55 & DEG; and enabling the excitation of spin waves with wavelengths down to 200 nm. The amplitude of the excited spin waves is constant and independent of the input microwave power due to the self-locking nonlinear shift, enabling robust adjustment of the spin-wave amplitudes in future on-chip magnonic integrated circuits.
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Peer-reviewed
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en
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Creative Commons Attribution-NonCommercial 4.0 International
http://creativecommons.org/licenses/by-nc/4.0/
http://creativecommons.org/licenses/by-nc/4.0/