Jian-Rong Gao develops superconducting THz heterodyne detector arrays for radio astronomy and fundamental physics applications. Key work: (1) hot electron bolometer (HEB) and SIS mixer THz receivers operating at sub-mm and THz frequencies; (2) detector arrays for space and ground-based radio telescopes (Herschel, ALMA, and future missions); (3) low-noise amplification at THz frequencies. Joint professor TU Delft and SRON (Netherlands Institute for Space Research).