Anomalous dispersion and negative group velocity in a coherence-free cold atomic medium

被引：10

作者：

Brown, William G. A. ^{[1
]}

McLean, Russell ^{[1
]}

Sidorov, Andrei ^{[1
]}

Hannaford, Peter ^{[1
]}

Akulshin, Alexander ^{[1
]}

机构：

[1] Swinburne Univ Technol, Ctr Atom Opt & Ultrafast Spect, ABC Ctr Excellence Quantum Atom Opt, Melbourne, Vic, Australia

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2008年 / 25卷 / 12期

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1364/JOSAB.25.000C82

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have observed the propagation of an approximately 35 ns long light pulse with a negative group velocity through a laser-cooled Rb-85 atomic medium, The anomalous dispersion results from linear atom-light interaction and is unrelated to long-lived ground-state coherences often associated with fast light in atomic media. The observed negative group velocity (-c/360.) in the Rb magneto-optical trap for a pulse attenuated by less than 50% is in good agreement with the value of dispersion measured independently by a rf heterodyne method. The spectral region of anomalous dispersion is between 15 and 40 MHz, which is an order of magnitude wider than that typically associated with ground-state coherences. (C) 2008 Optical Society of America

引用

页码：C82 / C86

页数：5

共 21 条

[1] Steep anomalous dispersion in coherently prepared Rb vapor [J].