We report here a sensitivity measurement of an all solid-state heterodyne receiver which uses a twin slot antenna coupled, small superconducting NbN hot electron bolometer as mixer and a semiconductor quantum cascade laser operating at 2.8 THz as local oscillator. We measure a double sideband receiver noise temperature of 3200 K at 2.8 THz and 4.2 K. We find that the optimal LO power is 33 nW measured at HEB and 1.3 /spl mu/W estimated at the QCL, much lower than the output power of the QCL. Such a receiver can be used for high-resolution spectroscopy above 2 THz and is particularly suitable for space-based observatories.


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    Title :

    Compact heterodyne receiver at 2.8 THz based on a quantum cascade laser and a superconducting bolometer


    Contributors:
    Yang, Z.Q. (author) / Hajenius, M. (author) / Hovenier, J.N. (author) / Baryshev, A. (author) / Baselmans, J.J.A. (author) / Gao, J.R. (author) / Klapwijk, T.M. (author) / Adam, A.J.L. (author) / Klaassen, T.O. (author) / Williams, B.S. (author)


    Publication date :

    2005-01-01


    Size :

    1179151 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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