摘要
激光技术的发展为极限光速的测量和应用提供了有效工具。本文主要介绍了与光速减慢有关的非线性光学知识和光速减慢的实验原理及方法。光速减慢实验中用到的低温Na原子气在探测激光和耦合激光的共同作用下处于量子相干态———一种非线性极化状态 ,由于电磁感应透明效应 (EIT) ,探测光可以使介质的折射率改变并能透过Na原子气 。
It's introduced mainly that the dependence of light speed reduction on the nonlinear optics characteristics of the medium,and experimental method of light speed reduction. Na atom gas at nK temperature, which used in the experiment of light speed reduction, is quantum coherent state when it is excited by probe laser and couple laser. Probe laser can change susceptibility of the medium and transparent the atom gas because of the electromagnetically induced transparency(EIT) effect. Light speed reduction is realized.
出处
《物理学进展》
CSCD
北大核心
2001年第4期385-391,共7页
Progress In Physics
基金
天津市自然科学基金项目资助 (No.0 1 360 341 1 )
国家杰出青年科学基金 (No.6982 51 0 8)
国家重点基础研究基金 (No .G1 9990 330 0 3)
