Near-Unity Chiral Terahertz Generation Driven by Asymmetric Quasi-Bound States in the Continuum
Efficient generation of terahertz (THz) radiation with both high emission strength and near-unity chiral purity remains a central challenge in nonlinear chiroptics. Here, we numerically demonstrate a framework for chiral THz generation from asymmetric lithium niobate (LN) metasurfaces enabled by chiral quasi-bound st...