Regensburg 2022 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 28: Magnonics 2
MA 28.6: Vortrag
Donnerstag, 8. September 2022, 10:45–11:00, H43
Exchange spin waves excitation in nanoscale magnonic waveguides using deeply nonlinear phenomena — •Qi Wang1,2, Roman Verba3, Björn Heinz4, Michael Schneider4, Ondřej Wojewoda5, Carsten Dubs6, Norbert Norbert2, Michal Urbánek5, Philipp Pirro4, and Andrii Chumak1 — 1Faculty of Physics, University of Vienna, Vienna, Austria — 2Wolfgang Pauli Institute c/o Faculty of Mathmatics, University of Vienna, Vienna, Austria — 3Institute of Magnetism, Kyiv, Ukraine — 4Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Kaiserslautern, Germany — 5CEITEC BUT, Brno University of Technology, Brno, Czech Republic — 6INNOVENT e.V., Technologieentwicklung, Jena, Germany
High-speed and ultrashort waves with pronounced nonlinear phenomena are an ideal medium for wave-based computing. Spin waves, and their quanta magnons, meet all the requirements and are prospective data carriers in future signal processing systems. However, an efficient method for the excitation of short-wavelength spin waves is still an unsolved problem and a major obstacle for broadband spin-wave applications. Here, we present a universal approach to excite spin waves with wavelengths from micrometers down to tens of nanometers in nanoscale waveguides by exploiting deep nonlinear phenomena and validate it experimentally by microfocused Brillouin light scattering spectroscopy. The novel excitation method removes the wavelength limitations imposed by the antenna size, increases the excitation efficiency of short spin waves, and enables direct on-chip integration.