Strongly coupled magnons and cavity microwave photons

TL;DR

This paper demonstrates a highly versatile cavity magnon-microwave photon system with ultrastrong coupling, enabling dynamic phenomena like Rabi oscillations and transparency, advancing coherent information processing technologies.

Contribution

The work introduces a strongly coupled magnon-photon system with ultrastrong coupling and high cooperativity, showcasing new dynamic effects in a scalable platform.

Findings

Achieved ultrastrong coupling with cooperativity of 12600.

Observed classical Rabi oscillations and magnetically induced transparency.

Demonstrated potential for coherent information processing.

Abstract

We realize a cavity magnon-microwave photon system in which magnetic dipole interaction mediates strong coupling between collective motion of large number of spins in a ferrimagnet and the microwave field in a three-dimensional cavity. By scaling down the cavity size and increasing number of spins, an ultrastrong coupling regime is achieved with a cooperativity reaching 12600. Interesting dynamic features including classical Rabi oscillation, magnetically induced transparency, and Purcell effect are demonstrated in this highly versatile platform, highlighting its great potential for coherent information processing.