Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
81 (2002), S. 532-534
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We demonstrate the use of the single-electron transistor as a radio-frequency mixer, based on the nonlinear dependence of current on gate charge. This mixer can be used for high-frequency, ultrasensitive charge measurements over a broad and tunable range of frequencies. We demonstrate operation of the mixer, using a lithographically defined thin-film aluminum transistor, in both the superconducting and normal states of aluminum, over frequencies from 10 to 300 MHz. We have operated the device both as a homodyne detector and as a phase-sensitive heterodyne mixer. We demonstrate a charge sensitivity of 〈4×10−3 e/Hz, limited by room-temperature electronics. An optimized mixer has a theoretical charge sensitivity of (approximately-less-than)1.5×10−5 e/Hz. © 2002 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1493221
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