title: Electromagnetically induced absorption in a nondegenerate three-level ladder system.
abstract: We investigate, theoretically and experimentally, the transmission of light through a thermal vapor of three-level ladder-type atoms, in the presence of two counterpropagating control fields. A simple theoretical model predicts the presence of electromagnetically induced absorption in this pure three-level system when the control field is resonant. Experimentally, we use (87)Rb in a large magnetic field of 0.62 T to reach the hyperfine Paschen-Back regime and realize a nondegenerate three-level system. Experimental observations verify the predictions over a wide range of detunings.
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Whiting
authors.forename: Erwan
authors.initials: E
authors.lastname: Bimbard
authors.forename: James
authors.initials: J
authors.lastname: Keaveney
authors.forename: Mark A
authors.initials: MA
authors.lastname: Zentile
authors.forename: Charles S
authors.initials: CS
authors.lastname: Adams
authors.forename: Ifan G
authors.initials: IG
authors.lastname: Hughes