title: Enhancement of four-wave mixing and line narrowing by use of quantum coherence in an optically dense double-? solid.
abstract: We have demonstrated enhanced nondegenerate four-wave mixing by use of a resonant probe in a double- ? system consisting of an optically dense spectral hole-burning solid. The observed probe diffraction efficiency is ~16% in amplitude at 6 K, which is higher than for an off-resonant probe in a ? -type scheme. We have also observed two-photon coherence line narrowing, which has potential application to high-resolution spectroscopy.
authors: B S
authors: BS
authors: Ham
authors: M S
authors: MS
authors: Shahriar
authors: P R
authors: PR
authors: Hemmer