Highly indistinguishable photons from deterministic quantum-dot microlenses utilizing three-dimensional in situ electron-beam lithography View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2015-12

AUTHORS

M Gschrey, A Thoma, P Schnauber, M Seifried, R Schmidt, B Wohlfeil, L Krüger, J-H Schulze, T Heindel, S Burger, F Schmidt, A Strittmatter, S Rodt, S Reitzenstein

ABSTRACT

The success of advanced quantum communication relies crucially on non-classical light sources emitting single indistinguishable photons at high flux rates and purity. We report on deterministically fabricated microlenses with single quantum dots inside which fulfil these requirements in a flexible and robust quantum device approach. In our concept we combine cathodoluminescence spectroscopy with advanced in situ three-dimensional electron-beam lithography at cryogenic temperatures to pattern monolithic microlenses precisely aligned to pre-selected single quantum dots above a distributed Bragg reflector. We demonstrate that the resulting deterministic quantum-dot microlenses enhance the photon-extraction efficiency to (23±3)%. Furthermore we prove that such microlenses assure close to pure emission of triggered single photons with a high degree of photon indistinguishability up to (80±7)% at saturation. As a unique feature, both single-photon purity and photon indistinguishability are preserved at high excitation power and pulsed excitation, even above saturation of the quantum emitter. More... »

PAGES

7662

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/ncomms8662

DOI

http://dx.doi.org/10.1038/ncomms8662

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1041028135

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/26179766


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