Eur. Phys. J. D (2014) 68: 130
https://doi.org/10.1140/epjd/e2014-40593-9

Regular Article

Soliton propagation in negative-index materials with self-steepening effect

¹ Department of Physics, Panjab University, 160014 Chandigarh, India
² Department of Physics, Anna University, Madurai region, 623513 Ramanathapuram, India
³ Department of Physics, Anna University, 600025 Chennai, India

^a e-mail: loombashally@gmail.com

Received: 29 September 2013
Received in final form: 8 January 2014
Published online: 22 May 2014

Abstract

In this paper, nonlinear Schrödinger equation (NLSE) with self-steepening term for dispersive permittivity and permeability which governs the ultrashort pulse propagation through negative-index materials (NIMs) is studied. The Lax pair is constructed for this model by employing AKNS procedure. The soliton solutions are generated with symbolic computation through Darboux transformation and the frequency regimes for their existence have been worked out. Through the graphical analysis of the soliton solutions, the propagation features of optical pulses and their interaction behaviours in NIMs are investigated.