{
  "annotation_id": "e3190e33-45bd-4530-8f95-5f728a536b01",
  "date_created": "2026-03-02T18:00:53.359000Z",
  "date_modified": "2026-03-02T18:00:53.359000Z",
  "file_hash": "f9b4e5054715e573abd246f25808f66449b0a20c845edfaa573ca634a679a5df",
  "private": false,
  "record": {
    "abstract": "We review the intensively discussed ideas about wave propagation and\nrefraction in media where both electric permittivity and magnetic permeability\nare negative. The criticism against negative refraction as violating the\ncausality principle is considered. Starting from the initial wave equations,\nrefraction of beams at the boundary of a left-handed medium is analyzed. The\nphysics of a perfect lens formed by a flat layer of a left-handed material is\nconsidered.",
    "arxiv_id": "physics/0408135",
    "authors": [
      "K. Yu. Bliokh",
      "Yu. P. Bliokh"
    ],
    "categories": [
      "physics.optics",
      "cond-mat.other",
      "physics.class-ph"
    ],
    "doi": "10.1070/PU2004v047n04ABEH001728",
    "journal_ref": "Physics-Uspekhi 47, 393 (2004) [trasl. from Uspekhi Fiz. Nauk 174,\n  439 (2004)]",
    "title": "What are the left-handed media and what is interesting about them?",
    "url": "https://arxiv.org/abs/physics/0408135"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c18034bd-a023-45a5-becb-26525966c447",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}