摘要
研究基于电磁感应透明效应的Λ梯型五能级原子中的超慢矢量光孤子。利用多重尺度展开法导出探测光场的左旋和右旋偏振分量所遵循的耦合非线性薛定谔方程。通过选取合适的参数,使得系统产生的克尔非线性效应与群速度色散平衡,从而探测光场的两个偏振分量可形成稳定的时间矢量光孤子。该矢量光孤子传播的速度可降至10-5c(c为真空中的光速),且所需输入的光功率低至微瓦量级。同时证明该系统可形成Manakov时间矢量光孤子。该研究结果对发展弱光非线性光学、设计弱光全光开关方面等具有一定的理论意义。
Ultraslow vector optical soliton is proposed in aΛ-Ladder five-level resonant atomic system via electromagnetically induced transparency.Based on the method of multiple scales,the coupled nonlinear Schrodinger equations of the left-and right-polarization components of the weak-light probe field can be derived.Through choosing appropriate parameters,the group velocity dispersion and the Kerr nonlinearity induced by self-phase modulation and cross-phase modulation are balanced well,thus vector optical soliton of the two polarization components of the weak-light probe field can form.It shows that the propagation velocity of vector optical soliton can be reduced to 10-5c,and their generation power can be lowered to several microwatts.Furthermore,Manakov vector soliton can be established in the atomic system by tuning system parameters appropriately.The result predicted here may have significant theoretical values for developing the theory of weak-light nonlinear optics and design of weak-light all-optical switching.
作者
陈志明
谢红强
王岳
谭嘉进
CHEN Zhi-ming;XIE Hong-qiang;WANG Yue;TAN Jia-jin(School of Science, East China University of Technology, Nanchang, 330013, China)
出处
《东华理工大学学报（自然科学版）》
CAS
2021年第1期62-67,共6页
Journal of East China University of Technology(Natural Science)
基金
国家自然科学基金项目(11704066,61705034)
江西省自然科学基金项目(20171BAB211007)
江西省教育厅项目(GJJ160576,GJJ160587)
东华理工大学教改课题(DHJG-18-16,DHJG-18-23)
东华理工大学博士启动基金项目(DHBK2016118)。
关键词
电磁感应透明
矢量光孤子
克尔非线性效应
electromagnetically induced transparency
vector optical solitons
Kerr nonlinear effect
作者简介
陈志明(1989—),男,博士,讲师,主要从事非线性光学方面的研究,E-mail:zmchen@ecut.edu.cn;通信作者:谢红强(1987—),男,博士,主要从事光学和强场激光等方面的研究,E-mail:hongqiangxie@ecut.edu.cn。
