title: Fast Purcell-enhanced single photon source in 1,550-nm telecom band from a resonant quantum dot-cavity coupling.
abstract: High-bit-rate nanocavity-based single photon sources in the 1,550-nm telecom band are challenges facing the development of fibre-based long-haul quantum communication networks. Here we report a very fast single photon source in the 1,550-nm telecom band, which is achieved by a large Purcell enhancement that results from the coupling of a single InAs quantum dot and an InP photonic crystal nanocavity. At a resonance, the spontaneous emission rate was enhanced by a factor of 5 resulting a record fast emission lifetime of 0.2 ns at 1,550 nm. We also demonstrate that this emission exhibits an enhanced anti-bunching dip. This is the first realization of nanocavity-enhanced single photon emitters in the 1,550-nm telecom band. This coupled quantum dot cavity system in the telecom band thus provides a bright high-bit-rate non-classical single photon source that offers appealing novel opportunities for the development of a long-haul quantum telecommunication system via optical fibres.
authors.forename: Muhammad Danang
authors.initials: MD
authors.lastname: Birowosuto
authors.forename: Hisashi
authors.initials: H
authors.lastname: Sumikura
authors.forename: Shinji
authors.initials: S
authors.lastname: Matsuo
authors.forename: Hideaki
authors.initials: H
authors.lastname: Taniyama
authors.forename: Peter J
authors.initials: PJ
authors.lastname: van Veldhoven
authors.forename: Richard
authors.initials: R
authors.lastname: Nötzel
authors.forename: Masaya
authors.initials: M
authors.lastname: Notomi