Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-12-11
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
8 Figures
Scientific paper
Microwave irradiation causes voltage fluctuations in solid state nanodevices. Such an effect is relevant in atomic electronics and nanostructures for quantum information processing, where charge or spin states are controlled by microwave fields and electrically detected. Here the variation of the characteristic times of the multiphonon capture and emission of a single electron by an interface defect in submicron MOSFETs is calculated and measured as a function of the microwave power, whose frequency of the voltage modulation is assumed to be large if compared to the inverse of the characteristic times. The variation of the characteristic times under microwave irradiation is quantitatively predicted from the microwave frequency dependent stationary current generated by the voltage fluctuations itself. The expected values agree with the experimental measurements. The coupling between the microwave field and either one or two terminals of the device is discussed. Some consequences on nanoscale device technology are drawn.
Calderoni Alessandro
Fanciulli Marco
Ferrari Giorgio
Prati Enrico
Sampietro Marco
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