Kuznetsov-Ma Soliton in Coupled Quantum Wells  

作　　者：杜英杰 谢小涛 于金影 白晋涛 

机构地区：[1]College of Physics, Northwest University, Xi'an 710068 [2]Institute of Photonics and photon-technology, Northwest University, Xi'an 710068

出　　处：《Chinese Physics Letters》2015年第7期90-94,共5页中国物理快报（英文版）

基　　金：Supported by the National Basic Research Program of China under Grant No 2010CB434811;the National Natural Science Foundation of China under Grant Nos 11047025 and 201180016

摘　　要：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.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.

关 键 词：Kuznetsov-Ma Soliton in Coupled Quantum Wells 

分 类 号：O471.1[理学—半导体物理]