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Proceedings Paper

Toward a quantum-limited charge detector
Author(s): Nadia A. Court; David J. Reilly; Tilo Markus Buehler; Robert P. Starrett; Robert G. Clark
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Paper Abstract

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.

Paper Details

Date Published: 28 February 2005
PDF: 5 pages
Proc. SPIE 5649, Smart Structures, Devices, and Systems II, (28 February 2005); doi: 10.1117/12.582220
Show Author Affiliations
Nadia A. Court, Univ. of New South Wales (Australia)
David J. Reilly, Univ. of New South Wales (Australia)
Tilo Markus Buehler, Univ. of New South Wales (Australia)
Robert P. Starrett, Univ. of New South Wales (Australia)
Robert G. Clark, Univ. of New South Wales (Australia)


Published in SPIE Proceedings Vol. 5649:
Smart Structures, Devices, and Systems II
Said F. Al-Sarawi, Editor(s)

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