title: Detuned slow light in the Doppler broadened multi-level D2 line of Rubidium.
abstract: We observed a detuned slow light phenomenon based on electromagnetically induced transparency in (87)Rb D2 line composed of multiple excited-hyperfine states within a Doppler-broadened linewidth. The results show that the maximum group delay of a probe occurs at off-detuned two-photon resonance frequency. The observed detuned group delay is analyzed with numerical calculations for a probe pulse interacting with the neighboring excited-states-modified Doppler broadening atoms for a fixed coupling field. The experimental results are in good agreement with the numerical calculations.
authors.affiliation: Center for Photon Information Processing, Graduate School of Information and Telecommunications, Inha University, Nam-gu, Incheon, South Korea.
authors.forename: Yi
authors.initials: Y
authors.lastname: Chen
authors.forename: Xiao Gang
authors.initials: XG
authors.lastname: Wei
authors.forename: Byoung S
authors.initials: BS
authors.lastname: Ham