Print Email Facebook Twitter Doubling of sensitivity and bandwidth in phonon cooled hot electron bolometer mixers Title Doubling of sensitivity and bandwidth in phonon cooled hot electron bolometer mixers Author Baselmans, J.J.A. Hajenius, M. Gao, J.R. Klapwijk, T.M. De Korte, P.A.J. Voronov, B. Gol'tsman, G. Faculty Applied Sciences Department Kavli Institute of Nanoscience Date 2004-03-15 Abstract We demonstrate that the performance of NbN lattice cooled hot electron bolometer mixers depends strongly on the interface quality between the bolometer and the contact structure. We show experimentally that both the receiver noise temperature and the gain bandwidth can be improved by more than a factor of 2 by cleaning the interface and adding an additional superconducting interlayer to the contact pad. Using this we obtain a double sideband receiver noise temperature TN,DSB = 950?K at 2.5 THz and 4.3 K, uncorrected for losses in the optics. At the same bias point, we obtain an IF gain bandwidth of 6 GHz. Subject niobium compoundssuperconducting mixerstype II superconductorsbolometersphononshot carriersoptical losses To reference this document use: http://resolver.tudelft.nl/uuid:b848ff67-3310-4e59-8aa6-608e994a34b4 Publisher American Institute of Physics ISSN 0003-6951 Source Applied Physics Letters, 84 (11), 2004 ; i:10.1063/1.1667012 Part of collection Institutional Repository Document type journal article Rights (c) 2004 The Author(s); American Institute of Physics Files PDF Klapwijk_2004.pdf 223.08 KB Close viewer /islandora/object/uuid:b848ff67-3310-4e59-8aa6-608e994a34b4/datastream/OBJ/view