Bright single photon source based on self-aligned quantum dot–cavity systems

Sebastian Maier, Peter Gold, Alfred Forchel, Niels Gregersen, Jesper Mørk, Sven Höfling, Christian Schneider, Martin Kamp

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    Abstract

    We report on a quasi-planar quantum-dot-based single-photon source that shows an unprecedented high extraction efficiency of 42% without complex photonic resonator geometries or post-growth nanofabrication. This very high efficiency originates from the coupling of the photons emitted by a quantum dot to a Gaussian shaped nanohill defect that naturally arises during epitaxial growth in a self-aligned manner. We investigate the morphology of these defects and characterize the photonic operation mechanism. Our results show that these naturally arising coupled quantum dot-defects provide a new avenue for efficient (up to 42% demonstrated) and pure (g2(0) value of 0.023) single-photon emission.

    Original languageEnglish
    JournalOptics Express
    Volume22
    Issue number7
    Pages (from-to)8136-8142
    ISSN1094-4087
    DOIs
    Publication statusPublished - 2014

    Bibliographical note

    This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-7-8136. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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