Optical interface for a hybrid magnon-photon resonator

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 near the region of anti-crossing between the loop gap and the ferrimagnetic resonances. The detection bandwidth is found to be limited by a ferrimagnetic damping rate.