Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 45: Focus Session: Magnon Transport in Metallic Spin Textures

MA 45.5: Vortrag

Mittwoch, 22. März 2017, 17:45–18:00, HSZ 04

Frequency-division multiplexing in magnonic networks by spin-wave caustics — •Frank Heussner, Alexander A. Serga, Burkard Hillebrands, and Philipp Pirro — Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, D-67663 Kaiserslautern, Germany

Frequency-division multiplexing is the basis for parallel data processing in a single device and for efficient information transport through logic circuits. In such networks, signals at different frequencies are used to simultaneously transfer information through the same conduits in different frequency channels.

In this work, we present an approach for the realization of frequency-division multiplexing in magnonic networks, where spin waves (SW) are used to transport information and to perform logic operations by exploiting, e.g., interference effects. In particular, we utilize non-diffractive spin-wave beams in in-plane magnetized 2D magnetic media, so called SW caustics, which originate from the anisotropic SW dispersion. By using micromagnetic simulations, we demonstrate how the frequency dependency of the propagation direction of SW caustics can be used to split SW signals of different frequencies into different SW waveguides. Finally, we present the design of a passive device at the micrometer scale which performs frequency-division multiplexing in a magnonic network.

Financial support by DFG within project SFB/TRR 173 Spin+X is gratefully acknowledged.