title: Impact of the dark path on quantum dot single photon emitters in small cavities.
abstract: Incoherent pumping in quantum dots can create a biexciton state through two paths: via the formation of bright or dark exciton states. The latter, dark-pumping path is shown to enhance the probability of two-photon simultaneous emission and hence increase g((2))(0) by a factor ∝ 1/γ(S), due to the slow spin relaxation rate γ(S) in quantum dots. The existence of the dark path is shown to impose a limitation on the single photon emission process, especially in nanocavities which exhibit a large exciton-cavity coupling and a Purcell enhancement for fast quantum telecommunications.
authors.affiliation: Institute of Industrial Science, University of Tokyo, Tokyo 153-8505, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Kamide
authors.affiliation: Institute of Industrial Science, University of Tokyo, Tokyo 153-8505, Japan and Institute for Nano Quantum Information Electronics (NanoQuine), University of Tokyo, Tokyo 153-8505, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Iwamoto
authors.affiliation: Institute of Industrial Science, University of Tokyo, Tokyo 153-8505, Japan and Institute for Nano Quantum Information Electronics (NanoQuine), University of Tokyo, Tokyo 153-8505, Japan.
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Arakawa