Issue
EPL
Volume 84, Number 4, November 2008
Article Number 48002
Number of page(s) 4
Section Interdisciplinary Physics and Related Areas of Science and Technology
DOI http://dx.doi.org/10.1209/0295-5075/84/48002
Published online 11 November 2008
EPL, 84 (2008) 48002
DOI: 10.1209/0295-5075/84/48002

Pull-in control in microswitches using acoustic Casimir forces

R. Esquivel-Sirvent and L. Reyes

Instituto de Física, Universidad Nacional Autónoma de México, Ciudad Universitaria - México D. F. 01000, México

raul@fisica.unam.mx

received 23 August 2008; accepted in final form 8 October 2008; published November 2008
published online 11 November 2008

Abstract
In this paper we present a theoretical calculation of the acoustic Casimir pressure in a model microsystem. Unlike the quantum case, the acoustic Casimir pressure can be made attractive or repulsive depending on the frequency bandwidth of the acoustic noise. As a case study, a one-degree-of-freedom simple-lumped system in an acoustic resonant cavity is considered. We show that the frequency bandwidth of the acoustic field can be tuned to increase the stability in existing microswitch systems by selecting the sign of the force. The acoustic intensity and frequency bandwidth are introduced as two additional control parameters of the microswitch.

PACS
85.85.+j - Micro- and nano-electromechanical systems (MEMS/NEMS) and devices.
43.20.-f - General linear acoustics.
43.35.-c - Ultrasonics, quantum acoustics, and physical effects of sound.

© EPLA 2008