Chasing ’slow light’
E.B. Aleksandrov a
V.S. Zapasskii b
a Ioffe Institute, ul. Polytekhnicheskaya 26, St. Petersburg, 194021, Russian Federation
b Department of Physics, St. Petersburg State University, Petrodvorets, St. Petersburg, 198904, Russian Federation
A critical review of experimental studies on so-called
’slow light’ arising due to the anomalously high steepness of the refractive index dispersion under conditions of electromagnetically induced transparency or coherent population oscillations is presented. It is shown that a considerable amount of experimental evidence of the observation of ’slow light’ is not related
to the low group velocity of light and can be easily interpreted in terms of a standard model of interaction of light with a saturable absorber.