{
  "abstract": "An efficient single-photon nonlinearity is a key resource for photonic quantum technologies. Single-photon nonlinearities have been demonstrated with quantum dots (QDs) across a range of cavity and waveguide geometries. However, none of these realizations simultaneously provide high-efficiency direct fiber coupling and compatibility with scalable on-chip integration. The nanobeam cavity addresses these limitations through its in-plane geometry, which enables highly efficient, direct fiber coupling alongside scalable homogeneous and heterogeneous on-chip integration. Here, we report a single-photon nonlinearity from a nanobeam cavity coupled to a single quantum dot. The nanobeam interfaces directly with a single-mode fiber with an efficiency of 60%. Driven by resonant picosecond pulses, the platform achieves a single-photon nonlinearity with a low threshold of 0.24 incident photons per pulse. The system operates in the strong-coupling regime, exhibiting a coupling rate of g/2π = 29.1 GHz and a cooperativity of C = 3.98. These results establish the nanobeam cavity-QD system as a compact, chip-integrable, and fiber-compatible building block for scalable photonic quantum technologies.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.36658",
  "author_total": 6,
  "authors": [
    {
      "name": "Abhijit Biswas"
    },
    {
      "name": "Neelesh Kumar Vij"
    },
    {
      "name": "Allan S. Bracker"
    },
    {
      "name": "Margaret Stevens"
    },
    {
      "name": "Joel Q. Grim"
    },
    {
      "name": "Edo Waks"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dyws2g5dch86n.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.36658",
  "fulltext_url": null,
  "id": "dyws2g5dch86n",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.36658",
  "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",
      "3107|Semiconductor Quantum Structures and Devices"
    ]
  ],
  "openalex": "W7214898236",
  "pdf_url": "https://arxiv.org/pdf/2609.36658",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dyws2g5dch86n.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:31Z",
      "native_id": "2609.36658",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.36658"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Single-Photon Nonlinearity from a Nanobeam with a Quantum Dot",
  "title_text": "Single-Photon Nonlinearity from a Nanobeam with a Quantum Dot",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:31Z",
  "url": "https://research.draconitic.com/paper/dyws2g5dch86n",
  "venue": "arXiv",
  "versions": []
}