{
  "annotation_id": "a9ec365b-a666-4b6f-9a44-7ee3da90c545",
  "date_created": "2026-03-02T18:01:03.657000Z",
  "date_modified": "2026-03-02T18:01:03.657000Z",
  "file_hash": "7e3c05e0cccbd2ba439586d2848d8c5370758a8caa547f01dde8beb481edba6a",
  "private": false,
  "record": {
    "abstract": "Second harmonic generation and optical parametric amplification in\nnegative-index metamaterials (NIMs) are studied. The opposite directions of the\nwave vector and the Poynting vector in NIMs results in a \"backward\"\nphase-matching condition, causing significant changes in the Manley-Rowe\nrelations and spatial distributions of the coupled field intensities. It is\nshown that absorption in NIMs can be compensated by backward optical parametric\namplification. The possibility of distributed-feedback parametric oscillation\nwith no cavity has been demonstrated. The feasibility of the generation of\nentangled pairs of left- and right-handed counter-propagating photons is\ndiscussed.",
    "arxiv_id": "physics/0601055",
    "authors": [
      "A. K. Popov",
      "Vladimir M. Shalaev"
    ],
    "categories": [
      "physics.optics",
      "quant-ph"
    ],
    "doi": "10.1007/s00340-006-2167-4",
    "journal_ref": "Appl. Phys. B: Lasers and Optics v. 84, N1-2, 131 - 137 (2006);\n  Optics Lett. v. 31, 2169-71(2006); Laser Phys. Lett. v. 3, N6, 293-297 (2006)",
    "title": "Negative-Index Metamaterials: Second-Harmonic Generation, Manley-Rowe   Relations and Parametric Amplification",
    "url": "https://arxiv.org/abs/physics/0601055"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "130325ae-ea88-4cbc-b554-c23a43e07119",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}