Enhanced Raman scattering by spatially distributed atomic coherence

Chen, L. Q.; Guo-Wan Zhang; Chun-Hua Yuan; Jietai Jing; Ou, Z. Y.; Weiping Zhang
July 2009
Applied Physics Letters;7/27/2009, Vol. 95 Issue 4, p041115
Academic Journal
We demonstrate experimentally an enhancement in Raman scattering in Rb atomic vapor due to the atomic coherence initially prepared by a weak write laser. We find that the enhanced Raman scattering depends on the spatial distribution of the atomic spin coherence and can be explained with a simple picture of three-wave mixing. This effect can in principle be used to have a light conversion efficiency near unity in Raman process. Such an enhanced Raman scattering may have practical applications in quantum information, nonlinear optics, and laser spectroscopy.


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