Broadband terahertz heterodyne spectrometer exploiting synchrotron radiation at sub-megahertz resolution

A new spectrometer on the AILES beamline of the SOLEIL synchrotron facility to achieve sub-MHz resolution in the THz and far-IR regions is currently being developed. Thanks to a dedicated heterodyne detection by use of a new kind of molecular laser as local oscillator along with a Fast Fourier Transform Spectrometer, several pure rotation absorption lines of H
₂
S and CH
₃
OH around 1.073 THz have been recorded.