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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.