通过缓冲气体冷却实现相干光致密介质
量子物理
2009-02-03 v2
摘要
我们证明,缓冲气体冷却结合激光烧蚀可用于制造具有高光深和低多普勒展宽的相干光介质,该介质提供具有低碰撞退相干和低运动退相干的亚稳态。这一通用技术的演示为利用多种原子和分子实现相干光学开辟了途径。我们使用氦缓冲气体将 原子冷却至 7 K 以下,并减缓原子向器壁的扩散。该介质中的电磁感应透明(EIT)使得在初始光深 OD > 70 的介质中实现 50% 的透射率,并实现具有大延迟 - 带宽积的慢脉冲传播。在高光深区域,由于高效的四波混频,我们观察到了高对比度的光谱振荡。
引用
@article{arxiv.0805.1416,
title = {Realization of Coherent Optically Dense Media via Buffer-Gas Cooling},
author = {Tao Hong and Alexey V. Gorshkov and David Patterson and Alexander S. Zibrov and John M. Doyle and Mikhail D. Lukin and Mara G. Prentiss},
journal= {arXiv preprint arXiv:0805.1416},
year = {2009}
}
备注
4 pages, 4 figures. V2: modified title, abstract, introduction, conclusion; added references; improved theoretical fit in figure 3(b); shortened slow light theory description; clarified simplicity of apparatus. Final version as published in Phys. Rev. A