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±0.05, the device achieves a polarization ratio of 0.986, single-photon purity of g^2 (0)=0.078±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.
@article{arxiv.2401.14150,
title = {Polarized and bright telecom C-band single-photon source from InP-based quantum dots coupled to elliptical Bragg gratings},
author = {Zhenxuan Ge and Tunghsun Chung and Yu-Ming He and Mohamed Benyoucef and Yongheng Huo},
journal= {arXiv preprint arXiv:2401.14150},
year = {2024}
}