%0 Journal Article %1 Yang:20 %A Yang, Jingzhong %A Nawrath, Cornelius %A Keil, Robert %A Joos, Raphael %A Zhang, Xi %A Höfer, Bianca %A Chen, Yan %A Zopf, Michael %A Jetter, Michael %A Portalupi, Simone Luca %A Ding, Fei %A Michler, Peter %A Schmidt, Oliver G. %D 2020 %I OSA %J Opt. Express %K ihfg %N 13 %P 19457--19468 %R 10.1364/OE.395367 %T Quantum dot-based broadband optical antenna for efficient extraction of single photons in the telecom O-band %U http://www.opticsexpress.org/abstract.cfm?URI=oe-28-13-19457 %V 28 %X 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 g(2)(0)$=$0.049±0.02 at saturation power. This brings the practical implementation of quantum communication networks one step closer.

@article{Yang:20, 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 g(2)(0)$=$0.049{\textpm}0.02 at saturation power. This brings the practical implementation of quantum communication networks one step closer.}, added-at = {2020-06-22T11:59:37.000+0200}, author = {Yang, Jingzhong and Nawrath, Cornelius and Keil, Robert and Joos, Raphael and Zhang, Xi and H\"{o}fer, Bianca and Chen, Yan and Zopf, Michael and Jetter, Michael and Portalupi, Simone Luca and Ding, Fei and Michler, Peter and Schmidt, Oliver G.}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2c7a89e80550ea500bd47462133058e53/renerehwagen}, description = {OSA | Quantum dot-based broadband optical antenna for efficient extraction of single photons in the telecom O-band}, doi = {10.1364/OE.395367}, interhash = {7763e7b6877863dabe61535a3b12aa83}, intrahash = {c7a89e80550ea500bd47462133058e53}, journal = {Opt. Express}, keywords = {ihfg}, month = jun, number = 13, pages = {19457--19468}, publisher = {OSA}, timestamp = {2020-06-22T09:59:37.000+0200}, title = {Quantum dot-based broadband optical antenna for efficient extraction of single photons in the telecom O-band}, url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-28-13-19457}, volume = 28, year = 2020 }