title: Electrically tunable slow and fast lights in a quantum-dot semiconductor optical amplifier near 1.55 microm.
abstract: We have demonstrated both slow light in the absorption regime and fast light in the gain regime of a 1.55 microm quantum-dot semiconductor optical amplifier at room temperature. The theory with coherent population oscillations and four-wave mixing effects agrees well with the experimental results. We have observed a larger phase delay at the excited state than that at the ground state transition, likely due to the higher gain and smaller saturation power of the excited state.
authors.affiliation: Department of Electrical and Computer Engineering, University of Illinois, IL 61801, USA.
authors.forename: A
authors.initials: A
authors.lastname: Matsudaira
authors.forename: D
authors.initials: D
authors.lastname: Lee
authors.forename: P
authors.initials: P
authors.lastname: Kondratko
authors.forename: D
authors.initials: D
authors.lastname: Nielsen
authors.forename: S L
authors.initials: SL
authors.lastname: Chuang
authors.forename: N J
authors.initials: NJ
authors.lastname: Kim
authors.forename: J M
authors.initials: JM
authors.lastname: Oh
authors.forename: S H
authors.initials: SH
authors.lastname: Pyun
authors.forename: W G
authors.initials: WG
authors.lastname: Jeong
authors.forename: J W
authors.initials: JW
authors.lastname: Jang