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AbstractWe investigate theoretically the formation of two-component light with superluminal group velocity in a medium controlled by four Raman pump fields. In such an optical scheme only a particular combination of the probe fields is coupled to the matter and exhibits superluminal propagation; the orthogonal combination is uncoupled. The individual probe fields do not have a definite group velocity in the medium. Calculations demonstrate that this superluminal component experiences an envelope advancement in the medium with respect to the propagation in vacuum.
CitationSuperluminal two-color light in a multiple Raman gain medium 2014, 90 (3) Physical Review A
PublisherAmerican Physical Society (APS)
JournalPhysical Review A