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APS » Journals » Phys. Rev. Lett. » Volume 90 » Issue 4
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Phys. Rev. Lett. 90, 044102 (2003) [4 pages]

Observation of Locked Intrinsic Localized Vibrational Modes in a Micromechanical Oscillator Array

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M. Sato, B. E. Hubbard, and A. J. Sievers
Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853-2501

B. Ilic
Cornell Nanofabrication Facility and Department of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853-5403

D. A. Czaplewski and H. G. Craighead
Department of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853-3501

Received 23 August 2002; published 30 January 2003

The nonlinear vibrational properties of a periodic micromechanical oscillator array have been measured. For sufficiently large amplitude of the driver, the optic mode of the di-element cantilever array becomes unstable and breaks up into excitations ranging over only a few cells. A driver-induced locking effect is observed to eternalize some of these intrinsic localized modes so that their amplitudes become fixed and the modes become spatially pinned.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.044102
DOI:
10.1103/PhysRevLett.90.044102
PACS:
05.45.–a, 05.45.Xt, 63.20.Pw, 85.85.+j
 
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