Mobility oscillations in high-frequency modulated devicesM. 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