Visualizing intrinsic localized modes with a nonlinear micromechanical array


  • M. Sato Graduate School of Natural Science and Technology, Kanazawa University Kanazawa, Ishikawa 920-1192, Japan
  • A.J. Sievers Laboratory of Atomic and Solid State Physics, Cornell University Ithaca, NY 14853-2501, USA


Ключові слова:

nonlinear dynamics, intrinsic localized mode, discrete breather, stationary and traveling localized modes, micromechanical cantilever array.


Micromechanical cantilever arrays provide the opportunity to visualize the nonlinear excitations of a discrete nonlinear system in real time. Both stationary and moving localized nonlinear excitations can be produced either by driving the system at a frequency outside the plane wave spectrum or by driving the system at a frequency within the small amplitude dispersion curve range. To see these modes the tips of the cantilevers are imaged on a 1D CCD camera. The brightness of the image depends on the oscillation amplitude of the cantilever so that a distribution of amplitudes in the array can be recorded as a function of position and time. Both the stationary and traveling excitations have been successfully simulated using a nonlinear lumped element lattice model. The former ILM can appear in any size lattice while the latter requires a low density of modes for the formation of smoothly running excitation.


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Як цитувати

Sato, M.; Sievers, A. Visualizing Intrinsic Localized Modes With a Nonlinear Micromechanical Array. Fiz. Nizk. Temp. 2008, 34, 687-694.



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