Experimental Realization of a Passive GHz Frequency-Division Demultiplexer for Magnonic Logic Networks

TL;DR

This paper reports the experimental creation of a passive GHz frequency demultiplexer for magnonic logic networks, enabling frequency-dependent separation of spin waves without external control, advancing magnonic data processing.

Contribution

It introduces a novel passive spin-wave demultiplexer based on 2D magnon transport in unpatterned films, demonstrating frequency-dependent beam direction control.

Findings

Successful experimental demonstration of GHz frequency separation of magnons.

Passive device operation without external power or control.

Potential for scalable magnonic multiplexing circuits.

Abstract

The emerging field of magnonics employs spin waves and their quanta, magnons, to implement wave-based computing on the micro- and nanoscale. Multi-frequency magnon networks would allow for parallel data processing within single logic elements whereas this is not the case with conventional transistor-based electronic logic. However, a lack of experimentally proven solutions to efficiently combine and separate magnons of different frequencies has impeded the intensive use of this concept. In this Letter, the experimental realization of a spin-wave demultiplexer enabling frequency-dependent separation of magnonic signals in the GHz range is demonstrated. The device is based on two-dimensional magnon transport in the form of spin-wave beams in unpatterned magnetic films. The intrinsic frequency-dependence of the beam direction is exploited to realize a passive functioning obviating an external control and additional power consumption. This approach paves the way to magnonic multiplexing circuits enabling simultaneous information transport and processing.