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    "headline": "A Diamond Lens Made Lead Vacancies Ten Times Brighter",
    "slug": "a-diamond-lens-made-lead-vacancies-ten-times-brighter",
    "dek": "One solid-immersion lens also enabled two-photon interference from a single defect center.",
    "summary": "One solid-immersion lens also enabled two-photon interference from a single defect center.",
    "body_text": "Solid-immersion lenses fabricated on rough, high-temperature-annealed diamond increased lead-vacancy emission by about a factor of ten. Resonant excitation approached the transform-limited linewidth, and one center produced two-photon interference, supporting—but not completing—a path toward network nodes above four kelvin.",
    "why_it_matters": "One solid-immersion lens also enabled two-photon interference from a single defect center.",
    "limitations": [
      "Resonant excitation approached the transform-limited linewidth, and one center produced two-photon interference, supporting—but not completing—a path toward network nodes above four kelvin."
    ],
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        "text": "One solid-immersion lens also enabled two-photon interference from a single defect center.",
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        "qualification": "Resonant excitation approached the transform-limited linewidth, and one center produced two-photon interference, supporting—but not completing—a path toward network nodes above four kelvin."
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    "source_ids": [
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    "tags": [
      "diamond defects",
      "two-photon interference",
      "quantum networks"
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    "image_url": null,
    "corrections": []
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  "sources": [
    {
      "source_id": "source-2026-09-20-018",
      "title": "arXiv preprint 2609.19220",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2609.19220",
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      "published_at": "2026-09-16T09:25:49.000-04:00",
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    "name": "The Machine Press",
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    "title": "A Diamond Lens Made Lead Vacancies Ten Times Brighter",
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    "published_at": "2026-09-20T09:00:00.000-04:00",
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