title: Beating of exciton-dressed states in a single semiconductor InGaAs/GaAs quantum dot.
abstract: We report picosecond control of excitonic dressed states in a single semiconductor quantum dot. A strong laser pulse couples the exciton and biexciton states, to form an Autler-Townes doublet of the neutral exciton transition. The Rabi-splitting, and hence the admixture of the dressed states follows the envelope of the picosecond control laser. We create a superposition of dressed states, and observe the resulting beat: a direct measurement of a Rabi oscillation in time delay rather than the usual power domain.
authors.affiliation: Department of Physics and Astronomy, University of Sheffield, Sheffield, S3 7RH, United Kingdom.
authors.forename: S J
authors.initials: SJ
authors.lastname: Boyle
authors.forename: A J
authors.initials: AJ
authors.lastname: Ramsay
authors.forename: A M
authors.initials: AM
authors.lastname: Fox
authors.forename: M S
authors.initials: MS
authors.lastname: Skolnick
authors.forename: A P
authors.initials: AP
authors.lastname: Heberle
authors.forename: M
authors.initials: M
authors.lastname: Hopkinson