机构地区: 中山大学物理科学与工程技术学院光电材料与技术国家重点实验室
出 处: 《物理学报》 2005年第3期1420-1425,共6页
摘 要: 研究二能级原子层宽度对一维共振吸收布拉格反射镜中自感应透明光孤子形成的影响 .结果表明 :在有限宽度的二能级原子层中仍可激发稳定的移动孤子 ,其激发条件对原子层宽度依赖不大 ;然而静止孤子的存在条件却敏感地依赖于原子层的宽度 ,二能级原子层宽度只有小于某一特定值时 ,光脉冲才能演化成静止孤子 . Self-induced moving and zero-velocity ( ZV) gap solitons were studied in a resonantly absorbing Bragg reflector of finite atomic width. Numerical results showed that the existence of moving gap-soliton is in general not affected by the finite atomic width but the existence of the ZV gap-soliton is highly affected by the widths of the atomic layers. Thus the trapping of the photonic energy occurs only in very thin atomic layers arranged with Bragg periodicity.