均匀原子介质中四波混频产生艾里光束的研究（英文）  

Study of Airy Beams Generated via Four-Wave Mixing Process in a Homogeneous Atomic Medium

作　　者：李莉[1] 李姝丽[1] 张云哲[1] 李院院[1] 徐可为[1,2] 

机构地区：[1]西安文理学院应用物理研究所,陕西西安710065 [2]西安交通大学纳米薄膜与生物材料研究中心,陕西西安710049

出　　处：《激光与光电子学进展》2015年第8期188-194,共7页Laser & Optoelectronics Progress

基　　金：西安市科技计划项目(CX12189WL03)

摘　　要：研究了均匀原子介质中借助四波混频(FWM)产生的艾里光束。发现纯FWM(PFWM)及缀饰FWM(DFWM)过程产生的艾里光束均表现出抛物线路径加速的动力学特征,其加速率可通过调整作用于系统的外加光场的失谐量及强度得到显著改变。由于缀饰场的作用使得共振原子的原子相干及折射率产生非线性变化,DFWM信号的增强(抑制)及偏转位置的改变可简单通过调整缀饰场的失谐实现。这种FWM产生的艾里光束可望用于光能量传输、共振粒子操控及光信息处理。Airy beams generated by the four-wave mixing （FWM） process in a homogeneous atomic medium is investigated. It is shown that Airy beams generated by both pure-FWM （PFWM） and dressed-FWM （DFWM） processes exhibit accelerating dynamics with a parabolic trajectory. The acceleration rate of these Airy beams can be dramatically modified by changing the detuning and strength of the external fields applied to the system. Due to nonlinear change of atomic coherence and the refractive index of resonant atoms induced by the dressing field, the amplitude suppression （enhancement） and the deflection position variation of DFWM signals can be achieved simply by changing the detuning of the dressing field. Airy beams generated via the FWM process can possibly be a powerful tool for delivering optical power, resonant particle manipulation and optical information processing.

关 键 词：非线性光束 四波混频 艾里光束 增强 抑制 

分 类 号：O433[机械工程—光学工程]