title: Soliton excitations in a one-dimensional nonlinear diatomic chain of split-ring resonators.
abstract: We present a systematic analytical study of the dynamics of nonlinear magnetoinductive waves in a one-dimensional diatomic lattice of split ring resonators (SRRs) with Kerr nonlinear interaction between nearest neighbors. The linear spectrum of this model have two branches and exhibits a gap, which is proportional to the difference between two types of SRRs. We analyze the nonlinear excitations genuine of the discreteness and nonlinearity in such a diatomic chain based on an extended quasidiscreteness approach. Gap solitons (with vibrating frequency lying in the gap), resonant kinks (with the vibrating frequency lying in the frequency bands), and intrinsic localized modes (with the vibrating frequency being above all the frequency bands) are obtained explicitly. It is also shown that the existence of different localized structures depend strongly on the type of nonlinearity of the embedded medium (a self-focusing or defocusing one).
authors.affiliation: National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, People's Republic of China.
authors.forename: Weina
authors.initials: W
authors.lastname: Cui
authors.forename: Yongyuan
authors.initials: Y
authors.lastname: Zhu
authors.forename: Hongxia
authors.initials: H
authors.lastname: Li
authors.forename: Sumei
authors.initials: S
authors.lastname: Liu