Magnon Kerr effect in a strongly coupled cavity-magnon system

Abstract

We experimentally demonstrate magnon Kerr effect in a cavity-magnon system, where magnons in a small yttrium iron garnet (YIG) sphere are strongly but dispersively coupled to the photons in a three-dimensional cavity. When the YIG sphere is pumped to generate considerable magnons, the Kerr effect yields a perceptible shift of the cavity's central frequency and more appreciable shifts of the magnon modes. We derive an analytical relation between the magnon frequency shift and the drive power for the uniformly magnetized YIG sphere and find that it agrees very well with the experimental results of the Kittel mode. Our study paves the way to explore nonlinear effects in the cavity-magnon system.

9 pages, 5 figures

References in corpus (8)

• Quantum fluids of light
• Strongly coupled magnons and cavity microwave photons
• Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
• Quantum technologies with hybrid systems
• High Cooperativity Cavity QED with Magnons at Microwave Frequencies
• Spin Pumping in Electrodynamically Coupled Magnon-Photon Systems
• Exchange Magnon-Polaritons in Microwave Cavities
• Dispersive read-out of ferromagnetic resonance for strongly coupled magnons and microwave photons

Cited by in corpus (7)

• Observation of the exceptional point in cavity magnon-polaritons
• Theory of the magnon Kerr effect in cavity magnonics
• Resources of nonlinear cavity magnonics for quantum information
• Magnon blockade in a PT-symmetric-like cavity magnomechanical system
• Circulating cavity magnon polaritons
• Quantum Simulation of the Fermion-Boson Composite Quasi-Particles with a Driven Qubit-Magnon Hybrid Quantum System
• Phonon laser in a cavity magnomechanical system