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

• URL: http://arxiv.org/abs/2401.14150v1
• Date: Thu, 25 Jan 2024 13:02:39 GMT
• Title: Polarized and bright telecom C-band single-photon source from InP-based quantum dots coupled to elliptical Bragg gratings
• Authors: Zhenxuan Ge, Tunghsun Chung, Yu-Ming He, Mohamed Benyoucef, and Yongheng Huo
• Abstract summary: We demonstrate a bright and polarized single-photon source operating in the telecom C-band based on an elliptical Bragg grating (EBG) cavity. The device achieves a polarization ratio of 0.986, single-photon purity of g2 (0)78$pm$0.016 and single-polarized photon collection efficiency of 24% at the first lens.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Bright, polarized, and high-purity single-photon sources in telecom wavelengths are crucial components in long-distance quantum communication, optical quantum computation and quantum networks. Semiconductor InAs/InP quantum dots (QDs) combined with photonic cavities provide a competitive path leading to optimal single-photon sources in this range. Here, we demonstrate a bright and polarized single-photon source operating in the telecom C-band based on an elliptical Bragg grating (EBG) cavity. With a significant Purcell enhancement of 5.25$\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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