title: Single charged quantum dot in a strong optical field: absorption, gain, and the ac-Stark effect.
abstract: We investigate a singly charged quantum dot under a strong optical driving field by probing the system with a weak optical field. We observe all critical features predicted by Mollow for a strongly driven two-level atomic system in this solid state nanostructure, such as absorption, the ac-Stark effect, and optical gain. Our results demonstrate that even at high optical field strengths the electron in a single quantum dot with its dressed ground state and trion state behaves as a well-isolated two-level quantum system.
authors.affiliation: The H. M. Randall Laboratory of Physics, The University of Michigan, Ann Arbor, Michigan 48109, USA.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Xu
authors.forename: Bo
authors.initials: B
authors.lastname: Sun
authors.forename: Erik D
authors.initials: ED
authors.lastname: Kim
authors.forename: Katherine
authors.initials: K
authors.lastname: Smirl
authors.forename: P R
authors.initials: PR
authors.lastname: Berman
authors.forename: D G
authors.initials: DG
authors.lastname: Steel
authors.forename: A S
authors.initials: AS
authors.lastname: Bracker
authors.forename: D
authors.initials: D
authors.lastname: Gammon
authors.forename: L J
authors.initials: LJ
authors.lastname: Sham