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准Λ型四能级原子系统中的可调谐双光子带隙

发表时间:2009-08-15  浏览量:1425  下载量:657
全部作者: 杜鹏,万仁刚,寇军,匡尚奇,高锦岳
作者单位: 吉林大学物理学院
摘 要: 研究了一个驻波场驱动的准Λ型四能级原子系统中实现的可调谐双光子带隙(double photonic band gaps, PBG)结构。利用驻波场对介质色散性质的空间周期调制,在探测场共振位置两侧同时实现了2个可调谐光子带隙结构。研究结果表明:通过控制驻波场强度,可以改变2个禁带的宽度,通过调整2个亚稳态下能级间距可以控制2个禁带的位置。所得到的高反射可调谐双光子禁带结构在实现全光双通道路由和控制2个不同中心频率脉冲的传播等方面有潜在应用价值。
关 键 词: 光学;双光子带隙;驻波;电磁感应光透明
Title: Double tunable photonic band gaps in a quasi�Λ�four�level atomic system
Author: DU Peng, WAN Rengang, KOU Jun, KUANG Shangqi, GAO Jinyue
Organization: College of Physics, Jilin University
Abstract: Double tunable photonic band gaps (PBG) can simultaneously appear when the dispersion property of the medium in a quasi�Λ�four�level atomic system is spatially modulated periodically by a resonant standing light field. Theoretical calculations show that efficient coherent control of two band gaps can be achieved by controlling the intensity of the standing field and the distance of two metastable levels. This scheme can be used as all�optical two�port signal router having double channels, and has potential application to control the propagations of two light pulses with different central frequencies.
Key words: optical; double photonic band gaps; standing wave; electromagnetically induced transparency
发表期数: 2009年8月第15期
引用格式: 杜鹏,万仁刚,寇军,等. 准Λ型四能级原子系统中的可调谐双光子带隙[J]. 中国科技论文在线精品论文,2009,2(15):1531-1535.
 
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