{
  "abstract": "Monolithic integration of single-photon sources into silicon photonics offers a compelling solution for realizing scalable quantum telecommunication architectures. Among the candidate silicon color centers, the C-center features a zero-phonon emission in the telecom L-band, corresponding to the spectral window of minimum transmission loss in optical fibers. Despite this advantage, isolating single C-centers has remained an unrealized challenge in solid-state quantum optics. In this work, we report the isolation of a single silicon C-center. We enhance the spontaneous emission rate of the zero-phonon line by coupling the single emitter to a nanophotonic crystal cavity, observing a fivefold reduction in the excited-state lifetime compared to bulk conditions, which corresponds to a Purcell factor lower bound of 33. Second-order autocorrelation measurements confirm single-photon emission from the investigated defect, obtaining an optical purity of $g^{(2)}(0) = 0.23$ without background correction. Our results establish a native telecom L-band quantum light source in silicon, laying the foundation for ultra-low-loss and long-distance quantum applications.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.37244",
  "author_total": 10,
  "authors": [
    {
      "name": "Carolina Crosta"
    },
    {
      "name": "Kyu-Young Kim"
    },
    {
      "name": "Purbita Purkayastha"
    },
    {
      "name": "Abhijit Biswas"
    },
    {
      "name": "Jasvith Raj Basani"
    },
    {
      "name": "Amirehsan Alizadehherfati"
    },
    {
      "name": "Amirehsan Boreiri"
    },
    {
      "name": "Chang-Min Lee"
    },
    {
      "name": "Fabio Pezzoli"
    },
    {
      "name": "Edo Waks"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8vc25fk7j6qdr.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.37244",
  "fulltext_url": null,
  "id": "8vc25fk7j6qdr",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.37244",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "2208|Photonic and Optical Devices"
    ]
  ],
  "openalex": "W7214962106",
  "pdf_url": "https://arxiv.org/pdf/2609.37244",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8vc25fk7j6qdr.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:31Z",
      "native_id": "2609.37244",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.37244"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "L-band single-photon generation from a cavity-coupled silicon C-center",
  "title_text": "L-band single-photon generation from a cavity-coupled silicon C-center",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:31Z",
  "url": "https://research.draconitic.com/paper/8vc25fk7j6qdr",
  "venue": "arXiv",
  "versions": []
}