Visualizing intrinsic localized modes with a nonlinear micromechanical array

• Veröffentlicht in: Физика низких температур
• Datum: 2008
• Hauptverfasser: Sato, M., Sievers, A.J.
• Format: Artikel
• Sprache: English
• Veröffentlicht: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2008
• Schlagworte: Низкоразмерные и неупорядоченные системы
• Online Zugang: https://nasplib.isofts.kiev.ua/handle/123456789/117340
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: Visualizing intrinsic localized modes with a nonlinear micromechanical array / M. Sato, A.J. Sievers // Физика низких температур. — 2008. — Т. 34, № 7. — С. 687–694. — Бібліогр.: 41 назв. — англ.

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.