Quantum dot-based broadband optical antenna for efficient extraction of single photons in the telecom O-band

authored by: Jingzhong Yang, Cornelius Nawrath, Robert Keil, Raphael Joos, Xi Zhang, Bianca Höfer, Yan Chen, Michael Zopf, Michael Jetter, Simone Luca Portalupi, Fei Ding, Peter Michler, Oliver G. Schmidt
Abstract: Long-distance fiber-based quantum communication relies on efficient non-classical light sources operating at telecommunication wavelengths. Semiconductor quantum dots are promising candidates for on-demand generation of single photons and entangled photon pairs for such applications. However, their brightness is strongly limited due to total internal reflection at the semiconductor/vacuum interface. Here we overcome this limitation using a dielectric antenna structure. The non-classical light source consists of a gallium phosphide solid immersion lens in combination with a quantum dot nanomembrane emitting single photons in the telecom O-band. With this device, the photon extraction is strongly increased in a broad spectral range. A brightness of 17% (numerical aperture of 0.6) is obtained experimentally, with a single photon purity of = 0.049±0.02 at saturation power. This brings the practical implementation of quantum communication networks one step closer.
Organisation(s): Institute of Solid State Physics
QuantumFrontiers
External Organisation(s): University of Stuttgart
Leibniz Institute for Solid State and Materials Research Dresden (IFW)
Chemnitz University of Technology (CUT)
Type: Article
Journal: Optics express
Volume: 28
Pages: 19457-19468
No. of pages: 12
ISSN: 1094-4087
Publication date: 22.06.2020
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Atomic and Molecular Physics, and Optics
Electronic version(s): https://doi.org/10.1364/OE.395367 (Access: Open)

BibTeX

@article{b351e91c3c79406d8b37d5d7dfcaebe6,
title = "Quantum dot-based broadband optical antenna for efficient extraction of single photons in the telecom O-band",
abstract = "Long-distance fiber-based quantum communication relies on efficient non-classical light sources operating at telecommunication wavelengths. Semiconductor quantum dots are promising candidates for on-demand generation of single photons and entangled photon pairs for such applications. However, their brightness is strongly limited due to total internal reflection at the semiconductor/vacuum interface. Here we overcome this limitation using a dielectric antenna structure. The non-classical light source consists of a gallium phosphide solid immersion lens in combination with a quantum dot nanomembrane emitting single photons in the telecom O-band. With this device, the photon extraction is strongly increased in a broad spectral range. A brightness of 17% (numerical aperture of 0.6) is obtained experimentally, with a single photon purity of = 0.049±0.02 at saturation power. This brings the practical implementation of quantum communication networks one step closer.",
author = "Jingzhong Yang and Cornelius Nawrath and Robert Keil and Raphael Joos and Xi Zhang and Bianca H{\"o}fer and Yan Chen and Michael Zopf and Michael Jetter and Portalupi, {Simone Luca} and Fei Ding and Peter Michler and Schmidt, {Oliver G.}",
note = "Funding Information: Bundesministerium f{\"u}r Bildung und Forschung (16KIS0862, 16KIS0869); European Research Council (QD-NOMS GA715770); Deutsche Forschungsgemeinschaft (EXC-2123 390837967); Horizon 2020 Framework Programme (EMPIR 17FUN06 SIQUST). Funding Information: The authors thank B. Eichler, R. Engelhard, and S. Baunack for their technical support. This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany{\textquoteright}s Excellence Strategy – EXC-2123 QuantumFrontiers – 390837967. This project received funding from the EMPIR programme cofinanced by the Participating States and from the European Union{\textquoteright}s Horizon 2020 research and innovation program.",
year = "2020",
month = jun,
day = "22",
doi = "10.1364/OE.395367",
language = "English",
volume = "28",
pages = "19457--19468",
journal = "Optics express",
issn = "1094-4087",
publisher = "OSA - The Optical Society",
number = "13",
}