Kuznetsov–Ma Soliton in Coupled Quantum Wells
DU Ying-Jie1 , XIE Xiao-Tao1 , YU Jin-Ying1 , BAI Jin-Tao1,2**
1 College of Physics, Northwest University, Xi'an 7100682 Institute of Photonics and photon-technology, Northwest University, Xi'an 710068
Abstract ：We show the possibility to generate Kuznetsov–Ma solitons based on bound-to-bound intersubband transitions in an asymmetric two-coupled well structure. By presenting the modulation instability of the nonlinear system provided by the interaction between light fields and quantum wells, we show that the plane wave with small perturbation can evolve into periodic trains of pulses at high while controllable repetition rates. It is found that the formation of Kuznetsov–Ma solitons as well as their period is determined by the combination of group velocity dispersion, Kerr nonlinearity and the initial amplitude of the background wave. The present research may be useful for generating subpicosecond and femtosecond pulses.
收稿日期: 2015-03-31
出版日期: 2015-07-30
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2015, Vol. 32 
