High Density Planar High Temperature Superconducting Josephson Junctions Arrays
Final rept. 15 Mar 2004-14 Jun 2006
CALIFORNIA UNIV REGENTS SAN DIEGO LA JOLLA CA
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This report summarizes research performed on Josephson junctions fabricated from high temperature superconducting material. We have found that a circuit fabrication technique pioneered in our lab during previous AFOSR funding periods can be used to fabricate arrays of junctions as well as superconducting interference devices. The uniformity and close spacing of our devices is unsurpassed by any other junction technology. We have demonstrated tens of junctions operating coherently. If this can be scaled up to hundreds of junctions it will enable the generation of RADAR waveforms with the highest attainable accuracy allowed by quantum physics. Furthermore, we have shown that this technology can be used to fabricate superconducting quantum interference devices which may enable the fabrication of highly sensitive ultra-wideband microwave receive antenna. We also have shown that our technique is not limited to high temperature superconductors by demonstrating the first multi-junction magnesium diboride array circuit. During this period our work has resulted in 5 publications in referred journals, a PhD thesis and a patent.
- Electricity and Magnetism
- Solid State Physics