Toward a quantum-limited charge detector

Nadia A. Court; David J. Reilly; Tilo Markus Buehler; Robert P. Starrett; Robert G. Clark

doi:10.1117/12.582220

28 February 2005 Toward a quantum-limited charge detector

Nadia A. Court, David J. Reilly, Tilo Markus Buehler, Robert P. Starrett, Robert G. Clark

Proceedings Volume 5649, Smart Structures, Devices, and Systems II; (2005) https://doi.org/10.1117/12.582220
Event: Smart Materials, Nano-, and Micro-Smart Systems, 2004, Sydney, Australia

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.

Citation Download Citation

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); https://doi.org/10.1117/12.582220

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