{
  "annotation_id": "1d80a603-6f89-488c-9e60-d34739d8209e",
  "date_created": "2026-03-02T18:00:35.798000Z",
  "date_modified": "2026-03-02T18:00:35.798000Z",
  "file_hash": "533eae43437860788984d12d40a594ba544a87090f0326d6e0317ef00b158af1",
  "private": false,
  "record": {
    "abstract": "A technique for obtaining efficient bulk second order susceptibility in non\ncentro-symmetric Photonic Crystals (PC) made from centro-symmetric materials is\ndiscussed. The effect is based on the electric quadrupole effect, strong\nelectromagnetic mode deformation and non homogeneous contribution to volume\npolarization from different parts of the PC. The required symmetry breaking is\nintroduced on the macroscale of the PC unit cell. The obtained structural\nchi_str^(2) is comparable with the second order susceptibility of ordinary\nnon-linear materials. Phase matching can be achieved by introducing symmetry\nmodulation (Quasi Phase Matching) during fabrication of the PC.",
    "arxiv_id": "physics/0107080",
    "authors": [
      "A. Feigel",
      "Z. Kotler",
      "B. Sfez"
    ],
    "categories": [
      "physics.optics",
      "physics.class-ph"
    ],
    "doi": "10.1103/PhysRevB.65.073105",
    "title": "Effective Second Order Susceptibility in Photonic Crystals Composed from   Centro-Symmetric Materials",
    "url": "https://arxiv.org/abs/physics/0107080"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2928a7fa-e4fb-4f9b-900e-1001c53eb6a5",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}