Document Type

Article

Publication Date

5-2003

Department

Physics

Language

English

Publication Title

Chaos

Abstract

Intrinsic localized modes (ILMs) have been observed in micromechanical cantilever arrays, and their creation, locking, interaction, and relaxation dynamics in the presence of a driver have been studied. The micromechanical array is fabricated in a 300 nm thick silicon–nitride film on a silicon substrate, and consists of up to 248 cantilevers of two alternating lengths. To observe the ILMs in this experimental system a line-shaped laser beam is focused on the 1D cantilever array, and the reflected beam is captured with a fast charge coupled device camera. The array is driven near its highest frequency mode with a piezoelectric transducer. Numerical simulations of the nonlinear Klein–Gordon lattice have been carried out to assist with the detailed interpretation of the experimental results. These include pinning and locking of the ILMs when the driver is on, collisions between ILMs, low frequency excitation modes of the locked ILMs and their relaxation behavior after the driver is turned off.

© 2003 American Institute of Physics.

Comments

This published version is made available on Dickinson Scholar with the permission of the publisher. For more information on the published version, visit AIP Publishing's Website.

© 2003 American Institute of Physics

DOI

10.1063/1.1540771

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