We experimentally investigate electromagnetically-induced transparency (EIT) created on an inhomogeneously broadened 5S_1/2-5P_1/2 transition in rubidium vapor using a control field of a complex temporal shape. A comb-shaped transparency spectrum enhances the delay-bandwidth product and the light storage capacity for a matched probe pulse by a factor of about 50 compared to a single EIT line [D. D. Yavuz, Phys. Rev. A 75, 031801 (2007)]. If the temporal mode of the control field is slowly changed while the probe is propagating through the EIT medium, the probe will adiabatically follow, providing a means to perform frequency conversion and optical routing.
@article{arxiv.0905.1443,
title = {Multimode electromagnetically-induced transparency on a single atomic line},
author = {Geoff Campbell and Anna Ordog and A. I. Lvovsky},
journal= {arXiv preprint arXiv:0905.1443},
year = {2015}
}