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28 February 2005 Toward a quantum-limited charge detector
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The radio-frequency single-electron-transistor (rf-SET) is an electrometer that can sense a fraction of an electron charge on microsecond timescales. At present this device is prevented from reaching quantum limits by the noise contribution of the post-amplifier, generally a cryogenic high-electron mobility transistor (HEMT). We present results to date in our effort to construct an alternative post-amplifier based on the dc superconducting quantum interference device (SQUID). These SQUID-based amplifiers, which are fabricated in aluminium via electron beam lithography and shadow mask evaporation open the possibility of near-quantum-limited electrometry with the rf-SET.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nadia A. Court, David J. Reilly, Tilo Markus Buehler, Robert P. Starrett, and Robert G. Clark "Toward a quantum-limited charge detector", Proc. SPIE 5649, Smart Structures, Devices, and Systems II, (28 February 2005);


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