We 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.
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - 2014|
Kudriasov, V., Ruseckas, J., Mekys, A., Ekers, A., Bezuglov, N., & Juzeliunas, G. (2014). Superluminal two-color light in a multiple Raman gain medium. Physical Review A - Atomic, Molecular, and Optical Physics, 90(3), 033827_1-9. https://doi.org/10.1103/PhysRevA.90.033827