{
  "annotation_id": "2f946b85-a394-4ca6-9017-fc721ed7dcac",
  "date_created": "2026-03-02T18:00:56.759000Z",
  "date_modified": "2026-03-02T18:00:56.759000Z",
  "file_hash": "45a685ec1a627f471a360005d48cbd734d98ec64e5b6570c0b0639f091c5c899",
  "private": false,
  "record": {
    "abstract": "We study tunable refraction of light in one-dimensional periodic lattices\ninduced optically in a photorefractive crystal. We observe experimentally both\npositive and negative refraction of beams which selectively excite the first or\nsecond spectral bands of the periodic lattice, and demonstrate tunability of\nthe output beam position by dynamically adjusting the lattice depth. At higher\nlaser intensities, the beam broadening due to diffraction can be suppressed\nthrough nonlinear self-focusing while preserving the general steering\nproperties.",
    "arxiv_id": "physics/0503226",
    "authors": [
      "Christian R. Rosberg",
      "Dragomir N. Neshev",
      "Andrey A. Sukhorukov",
      "Yuri S. Kivshar",
      "Wieslaw Krolikowski"
    ],
    "categories": [
      "physics.optics",
      "nlin.PS"
    ],
    "doi": "10.1364/OL.30.002293",
    "journal_ref": "Opt. Lett. 30, 2293-2295 (2005)",
    "title": "Tunable positive and negative refraction in optically-induced photonic   lattices",
    "url": "https://arxiv.org/abs/physics/0503226"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "26143c72-d8e4-4302-87f2-250d3588c356",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}