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arXiv · 2401.14150

Polarized and bright telecom C-band single-photon source from InP-based quantum dots coupled to elliptical Bragg gratings

Zhenxuan Ge·Tunghsun Chung·Yu-Ming He·Mohamed Benyoucef·Yongheng Huo
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Abstract

Bright, polarized, and high-purity single-photon sources in telecom wavelengths are crucial components in long-distance quantum communication, optical quantum computation and quantum networks. Semiconductor InAs/InP quantum dots (QDs) combined with photonic cavities provide a competitive path leading to optimal single-photon sources in this range. Here, we demonstrate a bright and polarized single-photon source operating in the telecom C-band based on an elliptical Bragg grating (EBG) cavity. With a significant Purcell enhancement of 5.25$\pm$0.05, the device achieves a polarization ratio of 0.986, single-photon purity of g^2 (0)=0.078$\pm$0.016 and single-polarized photon collection efficiency of ~ 24% at the first lens (NA=0.65) without blinking. These findings suggest that C-band QD-based single-photon sources are potential candidates for advancing quantum communication.

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Zhenxuan Ge, Tunghsun Chung, Yu-Ming He, Mohamed Benyoucef, Yongheng Huo. 2024-01-25. Polarized and bright telecom C-band single-photon source from InP-based quantum dots coupled to elliptical Bragg gratings. https://arxiv.org/abs/2401.14150

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