A Programmable Active THz Electromagnetic Surface On-Chip for Multi-Functional Imaging

An integrated THz imager is proposed with an actively reconfigurable electromagnetic interface that can engineer the surface reception properties to reconfigure its sensitivity and aperture for three incident field properties, namely frequency, polarization and incident angle. The chip realized in a 65 nm CMOS process achieves upto 15× enhancement in responsivity and NEP across 0.1–0.99 THz and enables a programmable and versatile THz interface for hyperspectral, multi-angle and multi-polarization imaging.