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A. V. Turukhin, V. S.
Sudarshanam, M. S. Shahriar, J. A. Musser, B. S. Ham, and P. R. Hemmer
Physical
Review Letters 88 (2): art. no. 023602 January 14 2002
Abstract
We report ultraslow
group velocities of light in an optically dense crystal of Pr doped
Y2SiO5. Light speeds as slow as 45 m/s were observed, corresponding
to a group delay of 66 mus. Deceleration and "stopping"
or trapping of the light pulse was also observed. These reductions
of the group velocity are accomplished by using a sharp spectral feature
in absorption and dispersion that is produced by resonance Raman excitation
of a ground-state spin coherence.
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