title: All-optically controlled concurrent slow-fast light pair.
abstract: We demonstrate how both normal and anomalous dispersion can be realized concurrently for a pair of weak probes in a doubly driven double-ladder configuration with independent and simultaneous control for group velocities of the pair. We have shown both analytically and numerically that, because of electromagnetically induced transparency and a χ((3))-based gain process, a slow-fast light pair can be realized in the same delay element with group indices ∼±10(7) accompanied by gain or relatively small absorption (down to ∼25%). We also identify parameter regions for realization of concurrent slow-slow and fast-fast light pairs with reduced absorptions.
authors.affiliation: Air Force Research Laboratory, Propulsion Directorate, Wright-Patterson AFB, Ohio 45433, USA. anil.patnaik@wpafb.af.mil
authors.forename: Anil K
authors.initials: AK
authors.lastname: Patnaik
authors.forename: Sukesh
authors.initials: S
authors.lastname: Roy
authors.forename: James R
authors.initials: JR
authors.lastname: Gord