Cavity magnon polariton based precision magnetometry

A photon-magnon hybrid system can be realised by coupling the electron spin resonance of a magnetic material to a microwave cavity mode. The quasiparticles associated with the system dynamics are the cavity magnon polaritons, which arise from the mixing of strongly coupled magnons and photons. We il...

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Bibliographic Details
Published inarXiv.org
Main Authors Crescini, N, Braggio, C, Carugno, G, Ortolan, A, Ruoso, G
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 30.09.2020
Subjects
Electron paramagnetic resonance
Electron spin
Electrons
Ferrimagnetism
Holes
Hybrid systems
Magnetic materials
Magnetic measurement
Magnetism
Magnetometers
Magnons
Photons
Physics - Instrumentation and Detectors
Physics - Quantum Physics
Polaritons
Quantum theory
Spin resonance
System dynamics
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Summary:A photon-magnon hybrid system can be realised by coupling the electron spin resonance of a magnetic material to a microwave cavity mode. The quasiparticles associated with the system dynamics are the cavity magnon polaritons, which arise from the mixing of strongly coupled magnons and photons. We illustrate how these particles can be used to probe the magnetisation of a sample with a remarkable sensitivity, devising suitable spin-magnetometers which ultimately can be used to directly assess oscillating magnetic fields. Specifically, the capability of cavity magnon polaritons of converting magnetic excitations to electromagnetic ones, allows for translating to magnetism the quantum-limited sensitivity reached by state-of-the-art electronics. Here we employ hybrid systems composed of microwave cavities and ferrimagnetic spheres, to experimentally implement two types of novel spin-magnetometers.
ISSN:2331-8422
DOI:10.48550/arxiv.2008.03062