The manipulating of electromagnetically induced transparency in Pr3+: Y2SiO5 crystal by a rf-driving field

We studied theoretically the effect of an additional rf-driving field on electromagnetically induced transparency (EIT) and group velocity of a probe light in Pr3+:Y2SiO5 crystal. The results show that more than one EIT widnows could be opened and their position, intensity can be controlled by the rf-driving field. The depth and position of the minimum of group velocity could also be manipulated by the rf field.