Journal
PHYSICAL REVIEW LETTERS
Volume 94, Issue 20, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.94.204101
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In this Letter, the formation of complex oscillations of the type 2(n) M oscillations per period at the Mth superharmonic excitation is reported for electrostatic microelectromechanical systems. A dc bias (beyond dc symmetry breaking) and an ac signal (at the Mth superharmonic frequency) with an amplitude around ac symmetry breaking gives rise to M oscillations per period or period M response. On increasing the ac voltage, a cascade of period doubling bifurcations take place giving rise to 2(n) M oscillations per period. An interesting chaotic transition (1-band and 2-band chaos) is observed during the first period doubling bifurcation. The nonlinear nature of the electrostatic force is shown to be responsible for the reported observations.
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