Gangao Wei

1 Introduction Toxoplasma gondii (T. gondii), an obligate intracellular parasite, is one of the most prevalent protozoan infections in humans, with an estimated global seroprevalence exceeding 50% in certain populations (Torgerson and Mastroiacovo 2013; Gelaw et al. 2024; Bisetegn et al. 2023). Transmission occurs primarily through ingestion of tissue cysts from undercooked meat, ingestion of oocysts from contaminated water or soil, or congenital transmission (Almeria and Dubey 2021). While T.

Bulk transition metal dichalcogenides (TMDs) have found widespread applications on nanophotonics, condensed matter physics, and quantum optics, due to their high refractive index and stable excitonic response at room temperature. In this paper, based on the finite-element method simulations, we demonstrate that the high refractive index enables the fabrication of bulk WS2 into high-quality-factor metasurfaces that support chiral quasibound states in the continuum (Q-BICs).