{
  "annotation_id": "acad26f8-9538-4532-bbe6-59a3c14c177e",
  "date_created": "2026-03-02T18:00:46.931000Z",
  "date_modified": "2026-03-02T18:00:46.931000Z",
  "file_hash": "dc2c345cf92f178eb938e1de0c858dd793df66ad848d47eea3cebc4ba4f3cb84",
  "private": false,
  "record": {
    "abstract": "A method of formation of the tightly confined distortion-free fs pulses with\nthe step-like decreasing of intensity under the finite-length propagation in\nfree space is described. Such pulses are formed by the Fresnel source of a high\nrefraction-index waveguide. The source reproduces in free space a\npropagation-invariant (distortion-free) pulse confined by the waveguide.\nConverse to the case of material waveguides, when the pulse goes out from the\nFresnel (virtual) waveguide its shape is not changed, but the intensity\nimmediately drops down to the near-zero level.",
    "arxiv_id": "physics/0310057",
    "authors": [
      "G. Nyitray",
      "S. V. Kukhlevsky"
    ],
    "categories": [
      "physics.optics"
    ],
    "title": "Distortion-free tight confinement and step-like decay of fs pulses in   free space",
    "url": "https://arxiv.org/abs/physics/0310057"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e7945a4e-7bbc-440f-b077-968d540d70a9",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}