Cavity-mediated coupling of antiferromagnetic spin waves

Abstract

Coupling of space-separated oscillators is interesting for quantum and communication technologies. In this work, it is shown that two antiferromagnetic oscillators placed inside an electromagnetic cavity couple cooperatively to its terahertz modes and, in effect, hybridized magnon-polariton modes are formed. This is supported by a systematic study of reflection spectra from two parallel-plane slabs of hematite ($\alpha$-Fe${}_2$O${}_3$), measured as a function of their temperatures and separation distance, and modeled theoretically. The mediating cavity was formed by the crystals themselves and the experiment was performed in a practical distance range of a few millimetres and above room temperature. Cavity-mediated coupling allows for engineering of complex resonators controlled by their geometry and by sharing properties of their components.

References in corpus (17)

• Strong coupling between surface plasmon polaritons and emitters
• Strongly coupled magnons and cavity microwave photons
• Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
• Strong atom-field coupling for Bose-Einstein condensates in an optical cavity on a chip
• Quantum magnonics: when magnon spintronics meets quantum information science
• Hybrid magnonics: physics, circuits and applications for coherent information processing
• Tunable Exciton-Hybridized Magnon Interactions in a Layered Semiconductor
• Coherent coupling of two remote magnonic resonators mediated by superconducting circuits
• Coherent spin-spin coupling mediated by virtual microwave photons
• Electron spin ensemble strongly coupled to a three-dimensional microwave cavity
• Spin Pumping of an Easy-Plane Antiferromagnet Enhanced by Dzyaloshinskii-Moriya Interaction
• Observation of magnon-polarons in a uniaxial antiferromagnetic insulator
• Strong magnon-photon coupling within a tunable cryogenic microwave cavity
• Strong coupling antiferromagnetic resonance with sub-THz cavity fields
• Antiferromagnetic resonance in $\alpha$-Fe${}_2$O${}_3$ up to its Néel temperature
• Tunable cryogenic THz cavity for strong light-matter coupling in complex materials
• Cavity mediated level attraction and repulsion between magnons

Cited by in corpus (6)

• Terahertz cavity magnon polaritons
• Magnon and photon blockade in a hybrid antiferromagnet-cavity quantum system
• Current-Controlled Magnon-Magnon Coupling in an On-Chip Cavity Resonator
• Cavity-induced coherent magnetization and polaritons in altermagnets
• Hybridization of terahertz phonons and magnons in disparate and spatially-separated material specimens
• Terahertz magnon-polaritons control using a tunable liquid crystal cavity