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ST423 - Mo/Au Bilayer TES Resistive Transition Engineering (Contest runner-up)

Mo/Au Bilayer TES Resistive Transition Engineering
 
G. Wang1, C. L. Chang1,2,3, V. Yefremenko1, V. Novosad4, J. Pearson4,
R. Divan5, and J. E. Carlstrom1,2,3,6,7
 
1High Energy Physics Division, Argonne National Laboratory, 9700 S Cass Ave., Argonne, IL 60439 USA
2Kavli Institute for Cosmological Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 USA
3Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 USA
4V. Novosad and J. Pearson are with the Materials Science Division, Argonne National Laboratory, 9700 S Cass Ave., Argonne, IL 60439 USA
5Center for Nanoscale Materials, Argonne National Laboratory, 9700 S Cass Ave., Argonne, IL 60439 USA
6Enrico Fermi Institute, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 USA
7Department of Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 USA
 
Abstract — We have investigated two types of superconducting Transition Edge Sensors (TES) modified with structures on the surface. One is a Mo/Au TES modified with Nb stripes, which increase the transition temperature and broaden the transition width. Another is a Mo/Au TES modified Au stripes, which decrease the transition temperature and broaden the transition width. It is experimentally demonstrated that the resistive transition profile of a TES can be desirably engineered with a superconductor and/or a normal metal by properly choosing the width and spacing of the modification stripes on the surface.
 
Keywords (Index Terms) — Superconductivity, proximity effect, transition edge sensor, bolometer‎.
 
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), January 2015.
Received August 23, 2014; Selected September 10, 2014. Reference ST423; Category 4.

ASC 2014 manuscript 4EOr3C-03 published online in IEEE Trans. Appl. Supercond.
(IEEE XPLORE) DOI: 10.1109/TASC.2014.2379011, on December 9, 2014.