Strong Coupling of Magnons to Microwave Photons in Three-Dimensional Printed Resonators

TL;DR

This paper demonstrates strong coupling between magnons and microwave photons in compact, 3D-printed resonators with high quality factors, enabling tunable filters at room temperature.

Contribution

It introduces a novel 3D printed resonator design that achieves strong magnon-photon coupling with high efficiency and tunability.

Findings

Effective coupling of about 40 MHz at room temperature

Resonator volume was only 7% of standard cavities

High quality factors maintained in 3D printed cavities

Abstract

We report on ferromagnetic resonant mode hybridization in re-entrant cavities made with a commercial three-dimensional (3D) printer, followed by conventional 3D metalization with copper and tin. The cavity volume was only 7% that of a standard cavity resonating at the same frequency, while maintaining a high quality factor. Simulations were in very good agreement. We obtained an effective coupling of about 40 MHz in two cavities at room temperature. These experimental results demonstrate the utility of tunable filters based on complex 3D printed cavities.