Development of Kinetic Inductance Bolometers for the Space High-Cadence Observing Telescope

The Space High-Cadence Observing Telescope (SHOT) is proposed as a spaceborne 0.8-meter terahertz camera with remarkable imaging speed, aimed at conducting the inaugural large-sky terahertz survey and unlocking a pioneering realm for exploring the dynamic universe. Kinetic Inductance Bolometers (KIBs) represent a viable technique for the focal plane detector arrays of SHOT. In this paper, we present the design of a lumped-element kinetic inductance detector (LEKID) as the KIB detector, featuring various interdigital capacitors (IDCs) for tuning the resonator frequency. In KIB detector, the inductive component of the LEKID is thermally isolated from the substrate by a normal metal antenna, which serves to absorb terahertz signals. We conducted characterization on non-thermally isolated LEKID at temperatures of 1.5 and 0.01 Kelvin. The KIB design and fabrication processes have been established and the devices are fabricated with a 91.5% mechanical yield. The results form a foundation to build large arrays of KIB detectors using existing manufacturing technologies for SHOT.