The electromagnetically induced transparency (EIT) phenomenon in a four level atomic system with tripod configuration is studied. The results show that this configuration is equivalent to the combination of two single three-level Λ configurations, which, under certain conditions, results in the so-called double-EIT (DEIT) phenomenon. The properties of the double transparency windows for DEIT are discussed in detail and the possible experimental scheme is proposed.
@article{arxiv.0711.2750,
title = {Double Electromagnetically Induced Transparency in a Tripod-type Atom System},
author = {Xiao Li and Yu Liu and Hong Guo},
journal= {arXiv preprint arXiv:0711.2750},
year = {2007}
}