Deeply nonlinear excitation of self-normalized short spin waves

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

doi:10.1126/sciadv.adg4609

Titel

Deeply nonlinear excitation of self-normalized short spin waves

Autor*in

Qi Wang

Fakultät für Physik, Universität Wien

Roman Verba

Institute of Magnetism, Kyiv

Björn Heinz

Fachbereich Physik and Landesforschungszentrum OPTIMAS, Rheinland-Pfälzische Technische Universität Kaiserlautern-Landau

... show all

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° 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.

Objekt-Typ

journal article

Sprache

Englisch [eng]

Persistent identifier

phaidra.univie.ac.at/o:2065109

DOI

10.1126/sciadv.adg4609

Erschienen in

Titel

Science Advances

Band