title: Experimental observation of the bifurcation dynamics of an intrinsic localized mode in a driven 1D nonlinear lattice.
abstract: Linear response spectra of a driven intrinsic localized mode in a micromechanical array are measured as it approaches two fundamentally different kinds of bifurcation points. A linear phase mode associated with this autoresonant state softens in frequency and its amplitude grows as the upper frequency bifurcation point is approached, similar to the soft-mode kinetic transition for a single driven Duffing resonator. A lower frequency bifurcation point occurs when the four-wave-mixing partner of this same phase mode intercepts the top of the extended wave branch, initiating a second kinetic transition process.
authors.affiliation: Graduate School of Natural Science and Technology, Kanazawa University, Ishikawa 920-1192, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Sato
authors.forename: S
authors.initials: S
authors.lastname: Imai
authors.forename: N
authors.initials: N
authors.lastname: Fujita
authors.forename: S
authors.initials: S
authors.lastname: Nishimura
authors.forename: Y
authors.initials: Y
authors.lastname: Takao
authors.forename: Y
authors.initials: Y
authors.lastname: Sada
authors.forename: B E
authors.initials: BE
authors.lastname: Hubbard
authors.forename: B
authors.initials: B
authors.lastname: Ilic
authors.forename: A J
authors.initials: AJ
authors.lastname: Sievers