Sub-Terahertz Heterodyne Spectroscopy of Carbonyl Sulfide

We showed the preliminary results of traditional frequency modulated heterodyne spectroscopy and the phase modulated heterodyne spectroscopy in the J=21 to 22, 22 to 23 and 23 to 24 transitions (267.5GHz to 291.8GHz) of 16O12C32S in the ground vibrational state.