Mixing with the radio frequency single-electron transistor

Swenson, L. J.; Schmidt, D. R.; Aldridge, J. S.; Wood, D. K.; Cleland, A. N.
April 2005
Applied Physics Letters;4/25/2005, Vol. 86 Issue 17, p173112
Academic Journal
By configuring a radio frequency single-electron transistor as a mixer, we demonstrate a unique implementation of this device, that achieves good charge sensitivity with large bandwidth about a tunable center frequency. In our implementation we achieve a measurement bandwidth of 16 MHz, with a tunable center frequency from 0 to 1.2 GHz, demonstrated with the transistor operating at 300 mK. Ultimately this device is limited in center frequency by the RC time of the transistor’s center island, which for our device is ∼1.6 GHz, close to the measured value. The measurement bandwidth is determined by the quality factor of the readout tank circuit.


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