Terahertz cavity magnon polaritons
arXiv:2308.10159 · doi:10.1002/adom.202302270
Abstract
Hybrid light-matter coupled states, or polaritons, in magnetic materials have attracted significant attention due to their potential for enabling novel applications in spintronics and quantum information processing. However, most studies to date have been carried out for ferromagnetic materials with magnon excitations at gigahertz frequencies. Here, we have investigated strong resonant photon-magnon coupling at frequencies above 1 terahertz for the first time in a prototypical room-temperature antiferromagnetic insulator, NiO, inside a Fabry-Pérot cavity. The cavity was formed by the crystal itself when it was thinned down to an optimized thickness. By using terahertz time-domain spectroscopy in high magnetic fields up to 25 T, we swept the magnon frequency through Fabry-Pérot cavity modes and observed photon-magnon anticrossing behavior, demonstrating clear vacuum Rabi splittings exceeding the polariton linewidths. These results show that NiO is a promising platform for exploring antiferromagnetic spintronics and cavity magnonics in the terahertz frequency range.
References in corpus (11)
- Strongly coupled magnons and cavity microwave photons
- Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
- Hybrid quantum systems based on magnonics
- Spin Oscillations in Antiferromagnetic NiO Triggered by Circularly Polarized Light
- Direct imaging of current-induced antiferromagnetic switching revealing a pure thermomagnetoelastic switching mechanism
- Single-Shot Terahertz Time-Domain Spectroscopy in Pulsed High Magnetic Fields
- Time-Domain Terahertz Spectroscopy in High Magnetic Fields
- Strong coupling antiferromagnetic resonance with sub-THz cavity fields
- Magnetic phase transitions in Ta/CoFeB/MgO multilayers
- Cavity-mediated coupling of antiferromagnetic spin waves
- Magneto-optical Spectroscopy with RAMBO: A Table-Top 30 T Magnet
Cited by in corpus (7)
- Cavity engineering of solid-state materials without external driving
- Observation of the Magnonic Dicke Superradiant Phase Transition
- Magnon and photon blockade in a hybrid antiferromagnet-cavity quantum system
- Second-order correlation and squeezing of photons in cavities with ultrastrong magnon-photon interactions
- Hybridization of terahertz phonons and magnons in disparate and spatially-separated material specimens
- Terahertz magnon-polaritons control using a tunable liquid crystal cavity
- Ultrastrong magnon-photon coupling in superconductor/antiferromagnet/superconductor heterostructures at terahertz frequencies