Dispersive properties of electromagnetically induced transparency

Abstract

An atomic transition that has been made transparent by applying an additional electromagnetic field exhibits a rapidly varying refractive index with zero group velocity dispersion at line center. A 10-cm-long Pb vapor cell at an atom density of 7\ifmmode\times\else\texttimes\fi{}${10}^{15}$ atoms/${\mathrm{cm}}^{3}$ and probed on its 283-nm resonance transition has a calculated optical delay of 83 ns [(c/${\mathit{V}}_{\mathit{G}}$)=250].