“…However, most THz imaging techniques based on scanning method are still suffering the time-consuming disadvantage, greatly hindering the widespread applications of THz technology (Cocker et al, 2013;Watts et al, 2014). Along with the accelerated advances of high-power THz sources (Chen et al, 2019;Khalatpour et al, 2021;Samizadeh Nikoo et al, 2020;Zhang et al, 2021;Zhao et al, 2020) and various high-sensitivity THz detectors (Gayduchenko et al, 2021;Guo et al, 2020;Ma et al, 2019;Peng et al, 2020), THz spectral imaging technology turns out to be feasible. Among these devices, high-power THz quantum cascaded laser (QCL) light sources are facing the dawn of moving from the laboratory research stage to practical applications (Khalatpour et al, 2021;Stantchey et al, 2020), and THz video imaging technique is expected to usher in rapid development (Zhou et al, 2018).…”