{
  "annotation_id": "299cbc38-1158-4e15-b95e-44e9180fd97f",
  "date_created": "2026-03-02T18:00:46.592000Z",
  "date_modified": "2026-03-02T18:00:46.592000Z",
  "file_hash": "f1d3f2587f6820d75d3183b13021f0a0184e2b817dbc724dd4cffd3a6f0d3821",
  "private": false,
  "record": {
    "abstract": "Cladding structures of photonic band-gap fibers often have air-holes of\nnon-circular shape and, typically, close-to-hexagonal air holes with curved\ncorners are observed. We study photonic band-gaps in such structures by aid of\na two-parameter representation of the size and curvature. For the fundamental\nband-gap we find that the band-gap edges (the intersections with the air line)\nshift toward shorter wavelengths when the air-filling fraction f is increased.\nThe band-gap also broadens and the relative band-width increases exponentially\nwith f^2. Comparing to recent experiments [Nature 424, 657 (2003)] we find very\ngood agreement.",
    "arxiv_id": "physics/0310149",
    "authors": [
      "Niels Asger Mortensen",
      "Martin Dybendal Nielsen"
    ],
    "categories": [
      "physics.optics",
      "cond-mat"
    ],
    "doi": "10.1364/OL.29.000349",
    "journal_ref": "Opt. Lett. 29, 349 (2004).",
    "title": "Modeling of realistic cladding structures for air-core photonic band-gap   fibers",
    "url": "https://arxiv.org/abs/physics/0310149"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d940461b-4e5e-4e1a-9fc3-fe836692031f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}