Optical interface for a hybrid magnon-photon resonator

TL;DR

This paper demonstrates optical detection of magnetic resonance in a ferrimagnetic sphere resonator strongly coupled to a microwave resonator, using optical fibers for telecom-band light, and rules out heating effects as the detection mechanism.

Contribution

It introduces an optical interface for a hybrid magnon-photon system enabling magnetic resonance detection via optical methods.

Findings

Magnetic resonance can be optically detected at the anti-crossing region.

Optical detection is not caused by microwave-induced heating.

The system uses optical fibers for telecom-band light coupling.

Abstract

We study optical detection of magnetic resonance of a ferrimagnetic sphere resonator, which is strongly coupled to a microwave loop gap resonator. Optical fibers are employed for coupling the sphere resonator with light in the telecom band. We find that magnetic resonance can be optically detected in the region of anti-crossing between the loop gap and the ferrimagnetic resonances. By measuring the response time of the optical detection we rule out the possibility that microwave induced heating is responsible for the optical detectability.