射频驱动下电磁诱导透明窗口的分裂和增益的出现  

Splitting of electromagnetically induced transparency window and appearing of gain due to radio frequency field

作　　者：李晓莉[1,2] 尚雅轩[1] 孙江[1] 

机构地区：[1]河北大学物理科学与技术学院,保定071002 [2]中国科学院半导体研究所,半导体超晶格国家重点实验室,北京100083

出　　处：《物理学报》2013年第6期176-180,共5页Acta Physica Sinica

基　　金：国家自然科学基金青年基金(批准号:10804025);河北省自然科学基金(批准号:F2010000306);河北省高等学校科学研究项目(批准号:2011114)资助的课题~~

摘　　要：在Λ型三能级系统的基础上引入两个共振射频场,通过详细讨论系统的探测吸收特性随两个射频场Rabi频率取不同值时的变化规律,得出电磁诱导透明(EIT)的分裂规律以及EIT上出现增益现象的产生条件.研究结果表明:两个射频场对系统所起的控制作用不同,控制基态精细结构能级之间跃迁的射频场对EIT的分裂起作用,而控制激发态精细结构能级之间跃迁的射频场不会导致EIT的分裂;而且,只有当控制基态精细结构能级之间跃迁的射频场的Rabi频率大于控制激发态精细结构能级之间跃迁的射频场的Rabi频率时,才能产生EIT与增益相叠加的新特性.Two resonant radio frequency fields are added to lambda three-level system in this paper. By discussing the behaviors of probing field absorption profiles under the effect of different Rabi frequencies of two radio frequency fields, the splitting of electromagnetically induced transparency （EIT） can be seen and the overlapping between EIT and gain can be obtained. The results show that the two radio frequency fields have different control functions on the system. The radio frequency field which interacts with hyperfine levels of ground state plays a role in the splitting of EIT, but the radio frequency field which interacts with hyperfine levels of excited state does not work on it. In addition only when the Rabi frequency of radio frequency field interacting with hyperfine levels of ground state is greater than with hyperfine levels of excited state, can the new features about the overlapping between EIT and gain be obtained.

关 键 词：射频场 电磁诱导透明 增益 精细结构能级 

分 类 号：O431.2[机械工程—光学工程]