梯型四能级系统中超窄电磁感应透明与无反转增益

研究了两个光场作用下梯型四能级系统中Rabi频率及多通道辐射对电磁感应透明的影 响-在梯型四能级系统中上驱动场的Rabi频率对于超窄电磁感应透明及无反转增益的获得起 重要作用-不同的激发方式可改变电磁感应透明的位置-研究了偶极矩关联度在量子干 涉效应中所起的作用-利用缀饰态理论对数值计算结果给出了解释- 关键词： 梯型四能级系统 量子干涉效应 电磁感应透明 无反转增益

Ultra-narrow electromagnetically induced transparency and inversionless gain in a ladder-four-level system

In this paper, we study the effects of Rabi frequencies and multi-path radiation on the electromagnetically induced transparency (EIT) and the inversionless gain in a ladder- four-level system driven by two-coherent fields- The Rabi frequencies of the field-driven transition from the upper level to middle levels play an important role for the realization of the ultra-narrow EIT and inversionless gain- Different excitation mechanism can change the position of the EIT- The action of the spontaneous alignment of the dipole moment is investigated- The explanation for the numerical results is presented using the theory of dressed state