Nb/Al-AlN/Nb superconducting tunnel junctions: fabrication process and characterization results
Paper in proceeding, 2018
Modern radio astronomy demands for broadband receiver systems. For SIS mixers, this translates into objective to employsuperconducting tunnel junctions with very low RnA and low specific capacitance. The traditionally used Nb/AlOx/Nb junctions have largely approached their physical limit of minimizing those parameters. It is commonly recognized that it is AlN-barrier junctions, which are needed for further progressing of the broadband instrumentation for radio astronomy. In manuscript we present results of developing a fabrication process for high quality Nb/Al-AlN/Nb junctions and characterization the junctions' DC electric properties and their aging and annealing stability, as well as the junctions' specific capacitance.
Author
Alexey Pavolotskiy
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Vincent Desmaris
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Victor Belitsky
Chalmers, Space, Earth and Environment, Onsala Space Observatory
2018 29th IEEE International Symposium on Space Terahertz Technology, ISSTT 2018
Vol. 2018 107-111
29th IEEE International Symposium on Space THz Technology (ISSTT2018)
Pasadena, USA,
Pasadena, USA,
Subject Categories
Other Engineering and Technologies not elsewhere specified
Nano Technology
Infrastructure
Onsala Space Observatory
Nanofabrication Laboratory