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Highly efficient and pure few-photon source on chip

Zhaohui Ma1,2, Jia-Yang Chen1,2, Malvika Garikapati1,2, Zhan Li1,2, Chao Tang1,2, Yong Meng Sua1,2, and Yu-Ping Huang1,2,*

  • 1Department of Physics, Stevens Institute of Technology, 1 Castle Point Terrace, Hoboken, New Jersey 07030, USA
  • 2Center for Quantum Science and Engineering, Stevens Institute of Technology, 1 Castle Point Terrace, Hoboken, New Jersey 07030, USA

  • *yhuang5@stevens.edu
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Phys. Rev. Applied 20, 044033 – Published 12 October, 2023

DOI: https://doi.org/10.1103/PhysRevApplied.20.044033

Abstract

We report on multiphoton statistics of correlated twin beams produced in a periodic poled microring resonator on thin-film lithium niobate. Owing to high-cavity confinement and near-perfect quasi-phase-matching, the photon pairs are produced efficiently in single modes at rates reaching 27 MHz per μW pump power. By using a pump laser whose pulse-width impedance matches with the cavity, those photons are further created in single longitudinal modes with purity reaching 99%, without relying on later-on filtering. With a dual-channel photon-number-resolving detection system, we obtain directly the joint detection probabilities of multiphoton states up to three photons, with high coincidence to accidental contrast for each. Used as a single-photon source, it gives heralded gH(2)(0) around 0.04 at a single-photon rate of 650 kHz on chip. The findings of our research highlight the potential of this nanophotonic platform as a promising platform for generating nonclassical, few-photon states with ideal indistinguishability, for fundamental quantum optics studies and information applications.

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Phys. Rev. Applied 20, 044033– Published 12 October, 2023
  • Received 27 June 2023
  • Revised 14 September 2023
  • Accepted 22 September 2023
Article part of CHORUS
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