Volume 72, Number 3, November 2005
|Page(s)||362 - 368|
|Published online||30 September 2005|
Mobility oscillations in high-frequency modulated devices
Dipartimento di Fisica, Università di Perugia - I-06123 Perugia, Italy
2 Istituto Nazionale di Fisica Nucleare, Sezione di Perugia - I-06123 Perugia, Italy
3 Dipartimento di Fisica, Università di Camerino - I-62032 Camerino, Italy
Accepted: 6 September 2005
The effect of a high-frequency modulation on the output of a periodic device to either a static or a low-frequency input signal is accurately reproduced by renormalizing each Fourier component of the device substrate potential, separately. The resulting mobility is an oscillating function of the amplitude-to-frequency ratio of the high-frequency drive, alone. Contrary to common wisdom based on the linear response theory, we show that high-frequency modulations can influence the response of slowly (or dc) operated devices, with potential applications in sensor technology and cellular physiology.
PACS: 05.60.-k – Transport processes / 07.50.Qx – Signal processing electronics / 87.10.+e – General theory and mathematical aspects
© EDP Sciences, 2005
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