{
  "abstract": "Photonic chips with silicon nitride ($\\mathrm{Si_3N_4}$) microring resonators are well established as heralded single-photon sources, but their operation as frequency-degenerate twin-photon sources has not previously been demonstrated. Here, we realise a twin-photon source at telecommunication wavelengths in a $\\mathrm{Si_3N_4}$ ring microresonator via an inverse four-wave mixing (FWM) process, in which two photons from spectrally distinct pumps are converted into a pair of identical twin photons. The measurements show a maximum coincidence-to-accidental ratio (CAR) of $5.4\\pm0.6$. In addition, the microresonator functions as a heralded single-photon source through pump-degenerate spontaneous four-wave mixing (SFWM), exhibiting a spectral purity of $P=0.67\\pm0.05$ and a heralded anti-bunching of $g^{(2)}_h(0)=0.0042\\pm0.0015$. Together, these results demonstrate both photon-generation schemes on a single integrated $\\mathrm{Si_3N_4}$ platform, highlighting its potential for scalable, tailored quantum light generation.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.04171",
  "author_total": 11,
  "authors": [
    {
      "name": "Franz Pacher"
    },
    {
      "name": "Haochen Yan"
    },
    {
      "name": "Alekhya Ghosh"
    },
    {
      "name": "Arghadeep Pal"
    },
    {
      "name": "Toby Bi"
    },
    {
      "name": "Hao Zhang"
    },
    {
      "name": "Lixing You"
    },
    {
      "name": "Hao Li"
    },
    {
      "name": "Daniela Salvoni"
    },
    {
      "name": "Shuangyou Zhang"
    },
    {
      "name": "Pascal Del'Haye"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/62nrdbch0wy28.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.04171",
  "fulltext_url": null,
  "id": "62nrdbch0wy28",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.04171",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "2208|Photonic and Optical Devices"
    ]
  ],
  "openalex": "W7208772368",
  "pdf_url": "https://arxiv.org/pdf/2609.04171",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/62nrdbch0wy28.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:31Z",
      "native_id": "2609.04171",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.04171"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Twin-photon generation in a silicon nitride microresonator",
  "title_text": "Twin-photon generation in a silicon nitride microresonator",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:31Z",
  "url": "https://research.draconitic.com/paper/62nrdbch0wy28",
  "venue": "arXiv",
  "versions": []
}