Electromagnetically-induced transparency (EIT) is observed and
analyzed for the group velocity of a femtosecond light pulse interacting with
GaAs/AlGaAs multiple quantum wells (MQWs) in a transient regime. The
calculated slowdown factor of the group velocity inside the medium due to
the dynamic refractive index change is ~2.10 × 103. We discuss the potential
of EIT-induced slow light in GaAs/AlGaAs MQWs for ultrafast (~210GHz)
all-optical information processing such as photon routing.