Title :
A novel method of realizing two-dimensional array systems of high-T/sub c/ step-edge Josephson junctions
Author_Institution :
Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
We have developed a unique substrate terracing process to achieve two-dimensional arrays of high-T/sub c/ step-edge superconductor-normal metal-superconductor Josephson junctions. This process has been used to realize 3/spl times/3 and 3/spl times/6 antenna coupled arrays for direct detection of emission. An enhancement to this process incorporating a YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// base layer and a Nb/PdAu ground plane is described. This modification enabled the fabrication of arrays capacitively coupled to detector junctions for detection of emission at frequencies beyond 300 GHz. This report details the motivation, design, fabrication process, and preliminary results of several array experiments.<>
Keywords :
Josephson effect; barium compounds; high-temperature superconductors; yttrium compounds; 300 GHz; Nb-PdAu; Nb/PdAu ground plane; YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// base layer; YBa/sub 2/Cu/sub 3/O/sub 7/; antenna coupled arrays; capacitive coupling; detector junctions; fabrication; high-T/sub c/ step-edge Josephson junctions; substrate terracing; superconductor-normal metal-superconductor junctions; two-dimensional array; Antenna arrays; Circuits; Fabrication; Frequency; Josephson junctions; Phased arrays; Sensor arrays; Substrates; Superconducting epitaxial layers; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
