Realization of a chiral photonic-crystal cavity with broken time-reversal symmetry
Junichiro Kono
Nature Communications, Published online: 23 May 2026; doi:10.1038/s41467-026-73446-w Researchers realized the first truly chiral terahertz cavity with time-reversal-symmetry broken vacuum fields, with near-unity ellipticity at 0.66 THz and Q>50 under a 0.3 T field, offering a robust platform for chiral light–matter interactions.