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 (22)
- Strongly coupled magnons and cavity microwave photons
- Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
- Efficient metallic spintronic emitters of ultrabroadband terahertz radiation
- High cooperativity in coupled microwave resonator ferrimagnetic insulator hybrids
- Hybrid quantum systems based on magnonics
- Antiferromagnetic opto-spintronics: Part of a collection of reviews on antiferromagnetic spintronics
- Spin Oscillations in Antiferromagnetic NiO Triggered by Circularly Polarized Light
- Mechanism of Néel order switching in antiferromagnetic thin films revealed by magnetotransport and direct imaging
- Quantitative Study on Current-Induced Effect in an Antiferromagnet Insulator/Pt Bilayer Film
- Cavity Spintronics: An Early Review of Recent Progress in the Study of Magnon-Photon Level Repulsion
- Direct imaging of current-induced antiferromagnetic switching revealing a pure thermomagnetoelastic switching mechanism
- Magnon-photon coupling in antiferromagnets
- Single-Shot Terahertz Time-Domain Spectroscopy in Pulsed High Magnetic Fields
- Ultrafast coupled charge and spin dynamics in strongly correlated NiO
- Time-Domain Terahertz Spectroscopy in High Magnetic Fields
- Magnetic field dependence of antiferromagnetic resonance in NiO
- Strong coupling antiferromagnetic resonance with sub-THz cavity fields
- Spin-wave coupling to electromagnetic cavity fields in dysposium ferrite
- Magnetic phase transitions in Ta/CoFeB/MgO multilayers
- Cavity-mediated coupling of antiferromagnetic spin waves
- Self-stabilizing exchange-mediated spin transport
- 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