Micromagnetic Simulation and Optimization of Spin-Wave Transducers

TL;DR

This paper presents a micromagnetic simulation approach to optimize spin-wave transducers, significantly improving their efficiency for high-frequency wireless communication systems by enabling detailed design parameter studies.

Contribution

It introduces a novel micromagnetic simulation method to directly compute spin-wave resistance, extending analytical models to arbitrary geometries for transducer optimization.

Findings

Spin-wave efficiency can reach up to 0.75 with optimized parameters.

The simulation method effectively guides transducer design improvements.

Parameter tuning can further enhance transducer performance.

Abstract

The increasing demand for higher data volume and faster transmission in modern wireless telecommunication systems has elevated requirements for 5G high-band RF hardware. Spin-Wave technology offers a promising solution, but its adoption is hindered by significant insertion loss stemming from the low efficiency of magnonic transducers. This work introduces a micromagnetic simulation method for directly computing the spin-wave resistance, the real part of spin-wave impedance, which is crucial for optimizing magnonic transducers. By integrating into finite-difference micromagnetic simulations, this approach extends analytical models to arbitrary transducer geometries. We demonstrate its effectiveness through parameter studies on transducer design and waveguide properties, identifying key strategies to enhance the overall transducer efficiency. Our studies show that by varying single parameters of the transducer geometry or the YIG thickness, the spin-wave efficiency, the parameter describing the efficiency of the transfer of electromagnetic energy to the spin wave, can reach values up to 0.75. The developed numerical model allows further fine-tuning of the transducers to achieve even higher efficiencies.