Strong coupling antiferromagnetic resonance with sub-THz cavity fields

Abstract

Strong coupling of electromagnetic cavity fields with antiferromagnetic spin waves in hematite ($\alpha$-Fe${}_2$O${}_3$) was achieved above room temperature. A cube of hematite was placed in a metallic tube and transmission was measured, using a continuous-wave THz spectrometer. Spectra, collected as a function of temperature, reveal the formation of magnetic polaritons.

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• Quantum magnonics: when magnon spintronics meets quantum information science
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• Ultrastrong Magnon-Photon Coupling Achieved by Magnetic Films in Contact with Superconducting Resonators
• Antiferromagnetic resonance in $\alpha$-Fe${}_2$O${}_3$ up to its Néel temperature
• Terahertz cavity magnon polaritons
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• Antiferromagnetic resonance in $\alpha$-MnTe
• Magnon and photon blockade in a hybrid antiferromagnet-cavity quantum system
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• Terahertz magnon-polaritons control using a tunable liquid crystal cavity
• Ultrastrong magnon-photon coupling in superconductor/antiferromagnet/superconductor heterostructures at terahertz frequencies