Lodewijk, C.F.J. (author), Zijlstra, T. (author), Zhu, S. (author), Mena, F.P. (author), Baryshev, A.M. (author), Klapwijk, T.M. (author) We study, using niobium-technology, the bandwidth of SIS mixers operating at frequencies close to the energy-gap frequency. Microstriplines of niobium-silicon dioxide-niobium have different properties for the top and bottom superconductor, which we find to depend on the used fabrication process. Replacing the AlOx tunnel barrier by AlN, the...
journal article 2009
