A sensitive and fast radio frequency single-electron transistor

We have fabricated an aluminium single-electron transistor?(SET) and characterized it at frequencies up to 8?MHz by measuring the reflected signal from a 331?MHz resonant tank in which the transistor is embedded. Within a bandwidth of 8?MHz, we measured the charge sensitivity of this radio-frequency SET, i.e.?rf-SET, to 6.3?10-6?e/(Hz)1/2, which corresponds to the uncoupled energy sensitivity of 13.

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