{
  "annotation_id": "050e1ea7-b407-403e-9161-50420c07ad38",
  "date_created": "2026-03-02T18:00:43.433000Z",
  "date_modified": "2026-03-02T18:00:43.433000Z",
  "file_hash": "f4bfb86816d3f7b741eb3d0aa132db6158093227cf027adf1b1529e50f1de7e8",
  "private": false,
  "record": {
    "abstract": "We experimentally demonstrate for the first time that a linearly polarized\nbeam is focussed to an asymmetric spot when using a high-numerical aperture\nfocussing system. This asymmetry was predicted by Richards and Wolf\n[Proc.R.Soc.London A, 253, 358 (1959)] and can only be measured when a\npolarization insensitive sensor is placed in the focal region. We used a\nspecially modified photodiode in a knife edge type set up to obtain highly\nresolved images of the total electric energy density distribution at the focus.\nThe results are in good agreement with the predictions of a vectorial focussing\ntheory.",
    "arxiv_id": "physics/0304001",
    "authors": [
      "Ralf Dorn",
      "Susanne Quabis",
      "Gerd Leuchs"
    ],
    "categories": [
      "physics.optics"
    ],
    "doi": "10.1080/09500340308235246",
    "title": "The focus of light - linear polarization breaks the rotational symmetry   of the focal spot",
    "url": "https://arxiv.org/abs/physics/0304001"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ed82a80e-6004-4279-aa6b-1f7e3cee3f9a",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}