A Terahertz Scanner

We present a new technique for Terahertz spectrometry which uses a photonic heterodyne system to create and detect THz. The system creates a monochromatic THz beam with a linewidth of less than 1Hz and the frequency of this beam is swept between 20 GHz to 1.4 THz in order to record a spectrum. This offers high power per spectral component. Since the full THz system is based on heterodyne detection, the sensitivity of this system is potentially less than a femtowatt.

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