Highly indistinguishable on-demand resonance fluorescence photons from a deterministic quantum dot micropillar device with 74% extraction efficiency
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The implementation and engineering of bright and coherent solid state quantum light sources is key for the realization of both on chip and remote quantum networks. Despite tremendous efforts for more than 15 years, the combination of these two key prerequisites in a single, potentially scalable device is a major challenge. Here, we report on the observation of bright single photon emission generated via pulsed, resonance fluorescence conditions from a single quantum dot (QD) deterministically centered in a micropillar cavity device via cryogenic optical lithography. The brightness of the QD fluorescence is greatly enhanced on resonance with the fundamental mode of the pillar, leading to an overall device efficiency of η = (74 ± 4) % for a single photon emission as pure as g(2)(0) = 0.0092 ± 0.0004. The combination of large Purcell enhancement and resonant pumping conditions allows us to observe a two-photon wave packet overlap up to ν = (88 ± 3) %.
Unsleber , S , He , Y-M , Gerhardt , S , Maier , S , Lu , C-Y , Pan , J-W , Gregersen , N , Kamp , M , Schneider , C & Höfling , S 2016 , ' Highly indistinguishable on-demand resonance fluorescence photons from a deterministic quantum dot micropillar device with 74% extraction efficiency ' Optics Express , vol 24 , no. 8 , pp. 8539-8546 . DOI: 10.1364/OE.24.008539
© 2016, Optical Society of America. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at www.osapublishing.org / https://dx.doi.org/10.1364/OE.24.008539
DescriptionWe acknowledge financial support by the State of Bavaria and the German Ministry of Education and Research (BMBF) within the projects Q.com-H and the Chist-era project SSQN. Y.-M. H. acknowledges support from the Sino-German (CSC-DAAD) Postdoc Scholarship Program. Support from the Danish Research Council for Technology and Production via the Sapere Aude project LOQIT (DFF - 4005-00370) is gratefully acknowledged.
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