Magnetochiroptical Metasurfaces for Chiral Biosensing Down to the Few-Molecule Level

In this study we describe a metasurface with square two-dimensional nanocavities designed for enhanced chiral molecule sensing. Employing magneto-optical hyperbolic metamaterials, the structure achieves high sensitivity, enabling label-free biosensing at the few-molecule level. The results demonstrate significant potential for pharmaceutical and biosensing applications.