We report a slow light-enhanced photon echo method, whose retrieval efficiency is two orders of magnitude higher than that of conventional photon echoes. The enhanced photon echo efficiency is due to lengthened interaction time given by ultraslow group velocity.
@article{arxiv.0909.4992,
title = {Slow light enhanced photon echoes},
author = {J. Hahn and B. S. Ham},
journal= {arXiv preprint arXiv:0909.4992},
year = {2009}
}