V型四能级系统中探测场的增益问题  

Study on Gain of Probe Field in a V-Type Four-Level Atomic System

作　　者：王祥伟[1] 张向阳[1] 

机构地区：[1]江南大学理学院,江苏无锡214122

出　　处：《江南大学学报（自然科学版）》2009年第3期360-364,共5页Joural of Jiangnan University (Natural Science Edition)　

摘　　要：运用数值模拟的方法,分析了在共振条件下V型四能级系统中控制场拉比频率的变化对探测场的吸收和色散的影响,研究了在一定条件下耦合场拉比频率强度对探测场吸收曲线的影响特性,研究表明当耦合场的拉比频率强度增大到一定数值时,介质对探测场的响应表现为增益现象,并证实了在此能级系统中可以实现无粒子数反转光放大。Using numerical simulation methods, the properties of the absorption and dispersion of probe field in a four-level atomic system with two driving fields are analyzed. Under the condition of resonance, electromagnetically induced transparency （EIT） can appear in this system by adjusting the Rabi frequency of the coherent fields. Furthermore, the phenomenon of performance gain can be obtained by choosing appropriate parameters. Meanwhile, lasing without inversion （LWI） can be explicitly realized in this closed system.

关 键 词：量子干涉 电磁感应光透明 增益 无粒子数反转 

分 类 号：O431[机械工程—光学工程]