Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2004-11-16
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Submitted to Applied Physics Letters. Comments always very welcome, email:djr@phys.unsw.edu.au (New version contains extra dat
Scientific paper
By operating the radio frequency single electron transistor (rf-SET) as a mixer we present measurements in which the RC roll-off of the tunnel junctions is observed at high frequencies. Our technique makes use of the non-linear rf-SET transconductance to mix high frequency gate signals and produce difference-frequency components that fall within the bandwidth of the rf-SET. At gate frequencies >15GHz the induced charge on the rf-SET island is altered on time-scales faster than the inverse tunnel rate, preventing mixer operation. We suggest the possibility of utilizing this technique to sense high frequency signals beyond the usual rf-SET bandwidth.
Buehler T. M.
Reilly David J.
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