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We report on a detector-free on-chip dual frequency comb setup based on terahertz quantum cascade lasers. The presented dual-comb covers a bandwidth of 630 GHz with a centre frequency of 2.5 THz. Instead of a fast detector one of the lasers has been used as a fast detector itself. The frequency comb spacing was analysed using frequency counting techniques revealing an accuracy down to δfrep/fcarrier...
Heterostructure low barrier diode (HLBD) based on AlGaInAs has been designed, fabricated and characterized for zero-bias millimetre-wave detection. Detectors with different heterostructures and various active areas have been tested in order to optimize their characteristics for low-level radiometric detection. We have measured the microwave performances of HLBD from DC to 220 GHz. A responsivity of...
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