Acta Physica Sinica, Volume. 68, Issue 23, 234202-1(2019)

Relevance of the heralded efficiency of the heralded single-photon source to the heralded basis

Hong-En Yang1 and Lian-Fu Wei1,2、*
Author Affiliations
  • 1Information Quantum Technology Laboratory, International Cooperation Research Center of China Communication and Sensor Networks for Modern Transportation, School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China
  • 2Photonics Laboratory and Institute of Functional Materials, College of Science, Donghua University, Shanghai 201620, China
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    The method by measuring one photon of an entangled two-photon pair to simultaneously herald another photon as the single photon, is one of the important ways to prepare the desired single-photon source. However, achieving high herald efficiency is still an open problem. In this paper, with the polarization entangled photon pairs generated by the parametric down-conversion process in the I-type phase-matched BBO (β-BaB2O4) nonlinear crystal, we investigate how the herald efficiency of the single-photon along the ideal path depends on the selection of the heralded basis of the photon in the signal path. An extended Hanbury-Brown-Twiss experimental system is built with a fiber polarizing beam splitter and three single-photon detectors, to experimentally measure the herald efficiency of the heralded single-photon source. Our results show that with the present polarization entangled-photon system whose quality is relatively low, the herald efficiency with the $|+/-\rangle$ heralded basis is enhanced 4% compared with that with the $|H/V\rangle$ heralded basis.


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    Hong-En Yang, Lian-Fu Wei. Relevance of the heralded efficiency of the heralded single-photon source to the heralded basis[J]. Acta Physica Sinica, 2019, 68(23): 234202-1

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    Paper Information

    Received: Apr. 11, 2019

    Accepted: --

    Published Online: Sep. 17, 2020

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