微波驱动的四能级系统电磁诱导负折射特性  

Electromagnetically Induced Negative Refraction Driven by Microwave Field in Four-level System

作　　者：李晓莉[1] 王凤湘[2] 张连水[1] 

机构地区：[1]河北大学物理科学与技术学院,河北保定071002 [2]河北大学国有资产管理处,河北保定071002

出　　处：《河北大学学报（自然科学版）》2011年第6期596-601,共6页Journal of Hebei University(Natural Science Edition)

基　　金：河北省自然科学基金资助项目(A2009000140);河北省高等学校科学研究项目(2011114)

摘　　要：电磁诱导负折射现象是光与物质相互作用中表现出来的一种奇特的非线性效应,对其形成机理及非线性特性的研究具有重要的理论意义和巨大的潜在应用价值.建立了微波驱动下的四能级系统模型,研究了系统的介电常数和磁导率随系统参数的变化规律.由于本能级系统中存在一个可调谐耦合场,它同时与2个光学跃迁发生作用,研究结果表明,固定耦合场的拉比频率,通过改变它的频率失谐量可以得到系统的负折射率区域.Electromagnetically induced negative refraction is an intriguing phenomenon of light-atom interaction.The study of its formation mechanism and nonlinear behavior has theoretical significance and potential applications.In this paper,electromagnetically induced negative refraction is associated with a four-level system driven by microwave field,where a coupling field couples two separate optical transitions.The permittivity and permeability of the system is studied as a function of coupling field detunings,and the result shows that electromagnetically induced negative refraction can be realized by controlling the coupling field detunings when the Rabi frequency of coupling field is fixed.

关 键 词：负折射 可调谐耦合场 磁导率 介电常数 

分 类 号：O562.3[理学—原子与分子物理]