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Dresden 2020 – scientific programme

The DPG Spring Meeting in Dresden had to be cancelled! Read more ...

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MA: Fachverband Magnetismus

MA 45: Magnonics I

MA 45.2: Talk

Thursday, March 19, 2020, 09:45–10:00, HSZ 401

Realization of a nanoscale magnonic directional coupler for all-magnon circuits — •Qi Wang1, Martin Kewenig1, Michael Schneider1, Roman Verba2, Björn Heinz1,3, Moritz Geilen1, Morteza Mohseni1, Bert Lägel4, Florin Ciubotaru5, Christoph Adelmann5, Carsten Dubs6, Sorin Cotofana7, Thomas Brächer1, Philipp Pirro1, and Andrii Chumak1,81Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Kaiserslautern, Germany — 2Institute of Magnetism, Kyiv, Ukraine — 3Graduate School Materials Science in Mainz, Mainz, Germany — 4Nano Structuring Center, Technische Universität Kaiserslautern, Kaiserslautern, Germany — 5Imec, Leuven, Belgium — 6INNOVENT e.V., Technologieentwicklung, Jena, Germany — 7Department of Quantum and Computer Engineering, Delft University of Technology, Delft, The Netherlands — 8Faculty of Physics, University of Vienna, Vienna, Austria

Magnonics is a promising alternative in view of beyond-Moore computing in which information is carried by magnons instead of electrons. However, the major challenge in magnon-based computing is the transition from a single logic unit to an integrated circuit. Here, we report a nanoscale directional coupler fabricated from an 85 nm thick Yttrium Ion Garnet film, which consists of two coupled waveguides with a width of 350 nm separated by a gap of 320 nm. The directional coupler can be used as a universal unit for all-magnon circuits, working as a multiplexer, a AND gate and an XOR gate. These functions are demonstrated by Brillouin light scattering spectroscopy.

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