{
  "abstract": "The search for quantum emitters, delivering single photons \"on demand\" at cryogenic and elevated temperatures for photonic technologies is ever progressing. For example, micrometer-sized WS2 monolayers exhibit single photon emission by elaborated local defect or strain engineering. Here, we show that wet-chemically synthesised monolayered two-dimensional (2D) WS2 nano sheets (NSs) with lateral sizes of 14 (+/- 6 nm) readily emit single photons from exciton recombination without the need for substrate-induced patterning, strain/defect engineering or spectral filtering. Single particle spectroscopy of 70 individual NSs shows photoluminescence from excitons (2.02 eV), trios (1.94 eV) and defect-localized states (1.85 eV) with fast emission (t1<0.2 ns, t2=3.2 ns), allowing highly frequent excitation cycles. Pulsed at 80 MHz, colloidal WS2 NSs exhibit limited spectral diffusion, no blinking and distinct photon antibunching (g2(0)=0.07 at 5 K), thereby tackling challenges of established colloidal quantum dot systems (blinking, longer emission cycles), while retaining high single photon purity as key quality of deterministic quantum emitters.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.06144",
  "author_total": 7,
  "authors": [
    {
      "name": "Markus Xemaire"
    },
    {
      "name": "Jakob Keck"
    },
    {
      "name": "Marco Kögel"
    },
    {
      "name": "Marc Brecht"
    },
    {
      "name": "Jannik C. Meyer"
    },
    {
      "name": "Alfred J. Meixner"
    },
    {
      "name": "Jannika Lauth"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/28zs4t55p4t9k.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.06144",
  "fulltext_url": null,
  "id": "28zs4t55p4t9k",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.06144",
  "language": null,
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.chem-ph"
    ],
    [
      "arxiv",
      "physics.optics"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.06144",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-04",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/28zs4t55p4t9k.ris",
  "sources": [
    {
      "first_seen": "2026-11-05T15:20:56Z",
      "native_id": "2611.06144",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.06144"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "arxiv:physics.chem-ph",
      "subfield": "physical"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Colloidal 2D WS2 nanosheets exhibiting high-purity single photon emission",
  "title_text": "Colloidal 2D WS2 nanosheets exhibiting high-purity single photon emission",
  "type": "preprint",
  "updated_at": "2026-11-09T00:20:20Z",
  "url": "https://research.draconitic.com/paper/28zs4t55p4t9k",
  "venue": "arXiv",
  "versions": []
}