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arXiv · 2501.07417

Magnetic field-controlled nanoscale spin-wave vertical directional coupler

Krzysztof Szulc·Maciej Krawczyk
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Abstract

The directional coupler is a fundamental element of wave-based circuits. The state of the art for the spin-wave directional couplers consists mostly of macroscopic waveguides or two-dimensional planar systems. In this Letter, we present the design of the nanoscale spin-wave vertical directional coupler with a very high efficiency exceeding 99.5%. We demonstrate that the operation of the coupler can be controlled by the magnitude of the external magnetic field. Moreover, it can perform multiplexing and demultiplexing of the spin-wave signal. Such a device ought to become an essential element of the three-dimensional magnonic circuits.

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Krzysztof Szulc, Maciej Krawczyk. 2025-01-13. Magnetic field-controlled nanoscale spin-wave vertical directional coupler. https://arxiv.org/abs/2501.07417

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