High-speed THz imaging using a HCN laser and a HEMT THz detector

Terahertz (THz) radiation is poised to play a crucial role in a wide range of imaging applications, from security checks to medical diagnoses. In this study, we developed a high-speed THz imaging system for practical applications. The system utilizes a continuous wave (CW) discharge-pumped hydrogen cyanide (HCN) laser and an array detector with a resolution of 128×32 to perform THz imaging. We successfully measured an image with a spatial resolution of 2 mm within 2 seconds. Experimental results demonstrate that this THz imaging system has the potential to be utilized for security checks.