The role of excitation vector fields and all-polarisation state control of cavity magnonics

TL;DR

This paper introduces excitation vector fields with tunable polarization and profile in cavity magnonics, providing a new experimental control mechanism for spin-photon interactions and advancing quantum and spin-based technologies.

Contribution

It presents a novel method using excitation vector fields to control cavity magnon-polariton dynamics and develops theoretical models that match experimental results for various polarizations.

Findings

Effective control of magnon-photon interactions demonstrated.

Theoretical models accurately predict experimental outcomes.

Versatile platform for exploring hybrid quantum systems.

Abstract

Recently the field of cavity magnonics, a field focused on controlling the interaction between magnons and confined microwave photons within microwave resonators, has drawn significant attention as it offers a platform for enabling advancements in quantum- and spin-based technologies. Here, we introduce excitation vector fields, whose polarisation and profile can be easily tuned in a two-port cavity setup, thus acting as an effective experimental knob to explore the coupled dynamics of cavity magnon-polaritons. Moreover, we develop theoretical models that accurately predict and reproduce the experimental results for any polarisation state and field profile within the cavity resonator. This versatile experimental platform offers a new avenue for controlling spin-photon interactions and as such also delivering a mechanism to readily control the exchange of information between hybrid systems.