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  • 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
  • (Optica Publishing Group, 2015),
  • paper EA_8_5

Indistinguishable Photons from Deterministic Quantum Dot Microlenses

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Bright non-classical light sources emitting single and indistinguishable photons on demand constitute an essential building block towards the realization of quantum communication networks [1]. In recent years it turned out that single self-organized quantum dots (QDs) integrated into photonic microstructures are promising candidates for being used as efficient single-photon sources [2]. However, related work was almost exclusively performed with structures based on statistically grown QDs in combination with random device technology. In this work we go a significant step further and report on the fabrication of spatially and spectrally aligned single QD microlenses using in-situ electron beam lithography. Apart from the practical aspect with high process yield of about 90%, our approach combines all features essential for quantum communication in a single device, namely high photon extraction efficiency, high suppression of multi-photon events and a high degree of indistinguishable photons.

© 2015 IEEE

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