Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-05-20
Rev. Sci. Instrum.82:013904,2011
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
The following article has been submitted to Review of Scientific Instruments
Scientific paper
10.1063/1.3518945
We report on the realization of a high sensitivity RF noise measurement scheme to study small current fluctuations of mesoscopic systems at milliKelvin temperatures. The setup relies on the combination of an interferometric ampli- fication scheme and a quarter-wave impedance transformer, allowing the mea- surement of noise power spectral densities with GHz bandwith up to five orders of magnitude below the amplifier noise floor. We simultaneously measure the high frequency conductance of the sample by derivating a portion of the signal to a microwave homodyne detection. We describe the principle of the setup, as well as its implementation and calibration. Finally, we show that our setup allows to fully characterize a subnanosecond on-demand single electron source. More generally, its sensitivity and bandwith make it suitable for applications manipulating single charges at GHz frequencies.
Berroir Jean-Marc
Denis Anne
Fève Gwendal
Glattli Christian D.
Mahé Adrien
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