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Vercruyssen, N. (author), Barends, R. (author), Klapwijk, T.M. (author), Muhonen, J.T. (author), Meschke, M. (author), Pekola, J.P. (author)We demonstrate an increased quasiparticle recombination time in superconducting resonators on a SiNx membrane, compared to identical resonators on a SiNx/Si wafer. An interpretation is given using a thermal model of the membrane. Using an array of tunnel junctions to cool or heat the membrane, we show that the resonators on the membranes are...journal article 2011
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Zijlstra, T. (author), Lodewijk, C.F.J. (author), Vercruyssen, N. (author), Tichelaar, F.D. (author), Loudkov, D.N. (author), Klapwijk, T.M. (author)High critical current-density (10?to?420?kA/cm2) superconductor-insulator-superconductor tunnel junctions with aluminum nitride barriers have been realized using a remote nitrogen plasma from an inductively coupled plasma source operated in a pressure range of 10?3–10?1?mbar. We find a much better reproducibility and control compared to previous...journal article 2007