Parametric amplification in a torsional microresonator

Dustin W. Carr, Stephane Evoy, Lidija Sekaric, H. G. Craighead, J. M. Parpia

Research output: Contribution to journalArticlepeer-review

158 Scopus citations


We observe parametric amplification in a torsional micron-scale mechanical resonator. An applied voltage is used to make a dynamic change to the torsional spring constant. Oscillating the spring constant at twice the resonant frequency results in a phase dependent amplification of the resonant motion. Our results agree well with the theory of parametric amplification. By taking swept frequency measurements, we observe interesting structure in the resonant response curves.

Original languageEnglish (US)
Pages (from-to)1545-1547
Number of pages3
JournalApplied Physics Letters
Issue number10
StatePublished - Sep 4 2000

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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