Slow-light pulses in moving media

J. Fiurášek, U. Leonhardt, R. Parentani
2001 Physical Review A. Atomic, Molecular, and Optical Physics  
Slow light in moving media reaches a paradoxical regime when the flow speed of the medium approaches the group velocity of light. Pulses can penetrate a region where a counter-propagating flow exceeds the group velocity. When the counter-flow slows down pulses are reflected.
doi:10.1103/physreva.65.011802 fatcat:linykxcwqfd6vjj6j5t4xttgli