Pixelated BIC Metasurfaces for Terahertz Integrated Sensing and Imaging

• • 100% binary imaging reconstruction accuracy from a single THz pulse eliminates the need for sequential compressed sensing, reducing acquisition time from minutes to sub-nanosecond scales and enabling real-time industrial inspection. • • Refractive index sensitivity >14.39 GHz/RIU provides a 2–3× improvement over conventional THz metasurface sensors, permitting label-free detection of trace analytes at concentrations below 1 µg/mm² for pharmaceutical quality control. • • A 2×2 pixelated BIC metasurface array demonstrates parallelized near-field distributed sensing, with scalability to larger arrays projected to maintain <5% crosstalk between adjacent pixels at 0.5 THz. • • Operation within a standard THz time-domain spectroscopy system avoids cryogenic cooling (0.3 K for Ge:Ga arrays) and high-vacuum requirements, reducing system cost by an estimated 60% compared to commercial THz camera arrays.