title: Dynamics of nonclassical light from a single solid-state quantum emitter.
abstract: We measure the dynamics of a nonclassical optical field using two-time second-order correlations in conjunction with pulsed excitation. The technique quantifies single-photon purity and coherence during the excitation-decay cycle of an emitter, illustrated here using a quantum dot. We observe that for certain pump wavelengths, photons detected early in the cycle have reduced single-photon purity and coherence compared to those detected later. A model indicates that the single-photon purity dynamics are due to exciton recapture after initial emission and within the same pulse cycle.
authors.affiliation: Joint Quantum Institute, National Institute of Standards and Technology and University of Maryland, Gaithersburg, Maryland 20899, USA. edward.flagg@nist.gov
authors.forename: Edward B
authors.initials: EB
authors.lastname: Flagg
authors.forename: Sergey V
authors.initials: SV
authors.lastname: Polyakov
authors.forename: Tim
authors.initials: T
authors.lastname: Thomay
authors.forename: Glenn S
authors.initials: GS
authors.lastname: Solomon