Deeply nonlinear excitation of self-normalized short spin waves

Autor(en)

Qi Wang, Roman Verba, Björn Heinz, Michael Schneider, Ondřej Wojewoda, Kristýna Davídková, Khrystyna Levchenko, Carsten Dubs, Norbert Mauser, Michal Urbánek, Philipp Pirro, Andrii Chumak

Abstrakt

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° 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.

Organisation(en)

Forschungsplattform MMM Mathematics-Magnetism-Materials, Nanomagnetismus und Magnonik

Externe Organisation(en)

National Academy of Sciences of Ukraine (NASU), Technische Universität Kaiserslautern, Central European Institute of Technology (CEITEC), Innovent e.V. Technologieentwicklung Jena, Wolfgang Pauli Institute (WPI) Vienna, Huazhong University of Science and Technology

Journal

Science Advances

Band

9

Anzahl der Seiten

9

ISSN

2375-2548

DOI

https://doi.org/10.1126/sciadv.adg4609

Publikationsdatum

08-2023

Peer-reviewed

Ja

ÖFOS 2012

103017 Magnetismus, 103015 Kondensierte Materie, 103008 Experimentalphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/ea32c488-7acd-44fe-8507-997918b1441b