Publications [#381517] of Henry Everitt

Papers Published

1. Kritzell, TE; Baydin, A; Tay, F; Rodriguez, R; Doumani, J; Nojiri, H; Everitt, HO; Barsukov, I; Kono, J, Terahertz Cavity Magnon Polaritons, Advanced Optical Materials, vol. 12 no. 10 (April, 2024) [doi]
   (last updated on 2025/11/07)

   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 magnon-polariton studies in the strong coupling regime to date have been carried out for ferromagnetic materials with magnon excitations at gigahertz frequencies. Here, strong resonant photon–magnon coupling at frequencies above 1 terahertz is investigated for the first time in a prototypical room-temperature antiferromagnetic insulator, NiO, inside a Fabry–Pérot cavity. The cavity is formed by the crystal itself with a thickness adjusted to an optimal value. Terahertz time-domain spectroscopy measurements in magnetic fields up to 25 T reveal the evolution of the magnon frequency through Fabry–Pérot cavity modes with 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.