| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
Two major problems of Intrinsic Localized Modes (ILM) in a nonlinear lattice were addressed;(1) a potential which prevents free translational motion of ILM called Peierls-Nabarro potential, and (2) generation of tail excitation behind the ILM when it travels. Suppression of PN potential in a saturable nonlinear lattice was confirmed experimentally by observing a liner spectrum when the ILM tales place width-widening (narrowing) bifurcation(s) by the saturation of the nonlinearity. The generation of tail excitation when the ILM travels at a constant speed is explained by a finite magnitude of a Fourier component of a nonlinear force where the ILM intersects with a dispersion curve. By mixing of two nonlinearities with a careful tuning, the sum Fourier amplitude can be eliminated and the generation of the tail excitation was suppressed.
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