Europhys. Lett.
Volume 72, Number 3, November 2005
Page(s) 362 - 368
Section General
Published online 30 September 2005
Europhys. Lett., 72 (3), pp. 362-368 (2005)
DOI: 10.1209/epl/i2005-10246-4

Mobility oscillations in high-frequency modulated devices

M. Borromeo1, 2 and F. Marchesoni3

1  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

received 2 August 2005; accepted in final form 6 September 2005
published online 30 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.

05.60.-k - Transport processes.
07.50.Qx - Signal processing electronics.
87.10.+e - General theory and mathematical aspects.

© EDP Sciences 2005