Buechel, Denis, Puetz, Patrick, Jacobs, Karl, Schultz, Michael, Graf, Urs U., Risacher, Christophe, Richter, Heiko, Ricken, Oliver, Huebers, Heinz-Wilhelm, Guesten, Rolf, Honingh, Cornelia E. and Stutzki, Juergen (2015). 4.7-THz Superconducting Hot Electron Bolometer Waveguide Mixer. IEEE Trans. Terahertz Sci. Technol., 5 (2). S. 207 - 215. PISCATAWAY: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. ISSN 2156-342X

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Abstract

We present the first superconducting hot electron bolometer (HEB) waveguide mixer operating at 4.7 THz. The 5.5-nm-thick, 300-nm-long, and 3600-nm-wide NbN HEB micro-bridge is integrated into a normal metal (Au) planar circuit on a 2 mu m thick silicon substrate. This circuit is integrated in a 24 mu m x 48 mu m x 21 mu m waveguide cavity and a 14 mu m x 7 mu m x 200 mu m substrate channel, which is directly machined into a CuTe alloy block. The power spectrum of the HEB mixer, measured with a Fourier transform spectrometer, is in good agreement with the results of 3-D EM circuit simulation. Measured mixer performance shows a state-of-the-art double sideband noise temperature of 1100 K, averaged over the IF bandwidth of 0.2-3.5 GHz. The 3-dB noise roll-off is 3.5 GHz. This mixer is used in the German REceiver for Astronomy at Terahertz frequencies (GREAT) at the airborne Stratospheric Observatory for Far Infrared Astronomy (SOFIA).

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Buechel, DenisUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Puetz, PatrickUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jacobs, KarlUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schultz, MichaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Graf, Urs U.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Risacher, ChristopheUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Richter, HeikoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ricken, OliverUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Huebers, Heinz-WilhelmUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Guesten, RolfUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Honingh, Cornelia E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stutzki, JuergenUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-405938
DOI: 10.1109/TTHZ.2014.2382434
Journal or Publication Title: IEEE Trans. Terahertz Sci. Technol.
Volume: 5
Number: 2
Page Range: S. 207 - 215
Date: 2015
Publisher: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Place of Publication: PISCATAWAY
ISSN: 2156-342X
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
HEB MIXER; HETERODYNE INSTRUMENT; NOISE; GREATMultiple languages
Engineering, Electrical & Electronic; Optics; Physics, AppliedMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/40593

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