{
  "annotation_id": "7e09a13a-8d5c-46f9-aea5-942fb5556d1b",
  "date_created": "2026-03-02T18:01:11.216000Z",
  "date_modified": "2026-03-02T18:01:11.216000Z",
  "file_hash": "0a76d51eebe1e7616ef6d03ff48761fc95ed93440a33aa15e228e2aa453cc934",
  "private": false,
  "record": {
    "abstract": "We studied the durations and average speeds of videopulses transmitted\nthrough chiral sculptured thin films using a finite-difference algorithm. The\nchiral STF was either linear or possessed an intensity-dependent permittivity.\nVideopulse durations tended to decrease with increasing carrier wavelength and\nto increase, for given carrier wavelength and polarization state, when the\nchiral STF was nonlinear with intensity-dependent permittivity. The rate of\ndecrease in durations with wavelength was less than that for longer-duration\npulses. The effect of the circular Bragg phenomenon was swamped by the wide\nbandwidth possessed by videopulses. Two measures of videopulse average speed\ndid not change much with carrier wavelength, and decreased slightly, for a\ngiven carrier wavelength and polarization state, in the nonlinear case. The\nother measure of average speed tended to increase with increasing carrier\nwavelength, and decrease, for a given carrier wavelength and polarization\nstate, in the nonlinear case.",
    "arxiv_id": "physics/0608104",
    "authors": [
      "Joseph B. Geddes III",
      "Akhlesh Lakhtakia"
    ],
    "categories": [
      "physics.optics",
      "physics.class-ph"
    ],
    "title": "Swamping of circular Bragg phenomenon and shaping of videopulses",
    "url": "https://arxiv.org/abs/physics/0608104"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ab21c61f-99bb-46e4-b5c0-9d207bfdc4c4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}