Open AccessFormation and propagation of dark solitons in metamaterials
Author(s) -
Hailan Liu,
Shuangchun Wen,
Min Xiong,
Xiaoyu Dai
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.6473
Subject(s) - physics , soliton , metamaterial , dispersion (optics) , pulse (music) , nonlinear system , ultrashort pulse , function (biology) , quantum electrodynamics , optics , quantum mechanics , laser , detector , evolutionary biology , biology
We use an extended Tanh-function expansion method to solve the nonlinear equation for ultrashort pulse propagation in matamaterialand obtain dark solitary solutions in various cases. Furtherwe study the influence of the controllable self-steepening effect and the second-order nonlinear dispersion on the formation and propagation of dark solitons in metamaterials. It is found that the negative self-steepening effect in metamaterial makes the soliton center move to the leading sideopposite to the moving direction of soliton in ordinary materials in which the self-steepening effect is always positive. Most importantlydue to the role of the second-order nonlinear dispersiondark solitons can be formed in the medium without linear dispersion or with an anomalous linear dispersion.