Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/6620

Optical Precursors with Electromagnetically Induced Transparency in Cold Atoms

Authors Wei, Dong
Chen, J. F.
Loy, M. M. T.
Wong, G. K. L.
Du, Shengwang
Issue Date 2009
Source Physical review letters , v. 103, (9), 2009, AUG 28, article number 093602
Summary We report the observation of Sommerfeld-Brillouin optical precursors generated from a long square-modulated laser pulse propagating through a cold atomic ensemble with electromagnetically induced transparency. The optical depth (alpha L-0) of the medium can be varied from 0 up to 50. We demonstrated that the step-on rising and step-off falling edges propagate with the speed of light in vacuum without a slow light effect. At high alpha L-0, the precursor is separated from the delayed main pulse at the rising edge, while at the falling edge, we observe damped oscillatory structures resulting from the interference between the precursor and main field.
Subjects
ISSN 0031-9007
Rights Physical Review Letters © copyright (2009) American Physical Society. The Journal's web site is located at http://prl.aps.org
Language English
Format Article
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