{
  "annotation_id": "c23d0b84-263f-43ab-8175-8d5f5fa04061",
  "date_created": "2026-03-02T18:00:42.943000Z",
  "date_modified": "2026-03-02T18:00:42.943000Z",
  "file_hash": "fbfe83ec2dc82d69ce00e939003132150b985f301f1257e542a78ce5ffcaaa82",
  "private": false,
  "record": {
    "abstract": "We study the effect of spatial dispersion of crystal modes on optical\nproperties such as the reflectivity $R$. As an example for isotropic media, we\ninvestigate the simplest model for phonons in ionic crystals and compare with\nprevious results for highly anisotropic plasmons, which are now understood from\na more general point of view. As a consequence of the wave vector dependence of\nthe dielectric function small changes in the lineshape are predicted. Beyond\nthat, if the frequency of minimal $R$ is near a pole of the dispersionless\ndielectric function, the relative amplitude of dips in $R$ with normal and\nanomalous dispersion differ significantly, if dissipation and disorder are low.",
    "arxiv_id": "physics/0303046",
    "authors": [
      "I. Kaelin",
      "Ch. Helm",
      "G. Blatter"
    ],
    "categories": [
      "physics.optics",
      "cond-mat.mtrl-sci"
    ],
    "doi": "10.1103/PhysRevB.68.012302",
    "title": "Optical Resonances in Reflectivity near Crystal Modes with Spatial   Dispersion",
    "url": "https://arxiv.org/abs/physics/0303046"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d1606f57-367f-48b9-8340-faebbb160ad7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}