Berlin 2008 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 5: Superconductivity - Cryodetectors
TT 5.4: Vortrag
Montag, 25. Februar 2008, 12:30–12:45, H 3010
Development of a terahertz heterodyne receiver with a superconducting hot electron bolometric mixer and a quantum cascade laser — •Heiko Richter1, Heinz-Wilhelm Hübers1, Sergey Pavlov1, Alexei Semenov1, Kostea Il'in2, Michael Siegel2, Lukas Mahler3, Alessandro Tredicucci3, Harvey Beere4, and David Ritchie4 — 1DLR, Institut für Planetenforschung, Rutherfordstr. 2, 12489 Berlin — 2Institut für Mikro- und Nanoelektronische Systeme, Hertzstr. 16, 76187 Karlsruhe — 3NEST-INFM and Scuola Normale Superiore,Piazza dei Cavalieri 7, 56126 Pisa, Italien — 4Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB3 0HE, England
We will report on the development of a terahertz (THz) heterodyne receiver with a superconducting hot electron bolometric (HEB) mixer and a quantum cascade laser as local oscillator for applications in astronomy, planetary research or security. The intermediate frequency bandwidth, noise temperature and antenna pattern of the mixer have been measured at several frequencies between 0.6 and 5 THz. Based on these results we have started the development of a cryogen-free heterodyne receiver with the QCL and the HEB mixer mounted in the same pulse tube cooler. First results obtained with this system will be reported.