Details
| Original language | English |
|---|---|
| Pages (from-to) | 19457-19468 |
| Number of pages | 12 |
| Journal | Optics express |
| Volume | 28 |
| Issue number | 13 |
| Early online date | 17 Jun 2020 |
| Publication status | Published - 22 Jun 2020 |
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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Optics express, Vol. 28, No. 13, 22.06.2020, p. 19457-19468.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Quantum dot-based broadband optical antenna for efficient extraction of single photons in the telecom O-band
AU - Yang, Jingzhong
AU - Nawrath, Cornelius
AU - Keil, Robert
AU - Joos, Raphael
AU - Zhang, Xi
AU - Höfer, Bianca
AU - Chen, Yan
AU - Zopf, Michael
AU - Jetter, Michael
AU - Portalupi, Simone Luca
AU - Ding, Fei
AU - Michler, Peter
AU - Schmidt, Oliver G.
N1 - Funding Information: Bundesministerium für 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’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’s Horizon 2020 research and innovation program.
PY - 2020/6/22
Y1 - 2020/6/22
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85087492492&partnerID=8YFLogxK
U2 - 10.1364/OE.395367
DO - 10.1364/OE.395367
M3 - Article
VL - 28
SP - 19457
EP - 19468
JO - Optics express
JF - Optics express
SN - 1094-4087
IS - 13
ER -