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TT: Tiefe Temperaturen

TT 8: Josephson-Kontakte

TT 8.1: Hauptvortrag

Dienstag, 23. März 1999, 10:00–10:30, F2

Ultrasensitive devices based on systems of small Josephson junctions — •P. Delsing¹, P. Wahlgren¹, R. Schoelkopf², H. Shimada¹, A. Kozhevnikov², D. Prober², D. Haviland³, and T. Claeson¹ — ¹Department of Microelectronics and Nanoscience Chalmers University of Technology S-412 96 Gothenburg, Sweden — ²Department of Applied Physics Yale University New Haven,CT 06520-8284 — ³Department of Physics The Royal Institute of Technology S-100 44 Stockholm, Sweden

There are a number of ultra sensitive devices which are based on the Coulomb blockade in both superconducting and normal tunnel junctions. Two different devices will be reviewed. i) The radio frequency Single Electron Transistor (RF-SET) which is an extremely sensitive electrometer and the RF version of it is also very fast. ii) Capacitively Coupled arrays of small Josephson junctions, which act as a current mirror and can be used to compare extremely small currents.