Discrete flat-band solitons in the kagome lattice

被引：59

作者：

Vicencio, Rodrigo A. ^{[1
,2
]}

Johansson, Magnus ^{[3
]}

机构：

[1] Univ Chile, Fac Ciencias, Dept Fis, MSI Nucleus Adv Opt, Santiago, Chile

[2] Univ Chile, Fac Ciencias, Ctr Opt & Photon CEFOP, Santiago, Chile

[3] Linkoping Univ, Dept Phys Chem & Biol, S-58183 Linkoping, Sweden

来源：

PHYSICAL REVIEW A | 2013年 / 87卷 / 06期

基金：

瑞典研究理事会;

关键词：

BREATHERS; ENERGY;

D O I：

10.1103/PhysRevA.87.061803

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We consider a model for a two-dimensional kagome lattice with defocusing nonlinearity, and show that families of localized discrete solitons may bifurcate from localized linear modes of the flat band with zero power threshold. Each family of such fundamental nonlinear modes corresponds to a unique configuration in the strong-nonlinearity limit. By choosing well-tuned dynamical perturbations, small-amplitude, strongly localized solutions from different families may be switched into each other, as well as moved between different lattice positions. In a window of small power, the lowest-energy state is a symmetry-broken localized state, which may appear spontaneously.

引用

页数：5

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