{
  "annotation_id": "bd10e4be-7e4f-4cd9-9134-c4792917e9f1",
  "date_created": "2026-03-02T18:01:45.464000Z",
  "date_modified": "2026-03-02T18:01:45.464000Z",
  "file_hash": "2fc8efb5f181cf811ae2e85379fb64eb01193151dd33860545971283f5b4fed8",
  "private": false,
  "record": {
    "abstract": "We study two-photon excitation using biphotons generated via the process of\nspontaneous parametric down-conversion in a nonlinear crystal. We show that the\nfocusing of these biphotons yields an excitation distribution that is\nessentially the same as the distribution of one-photon excitation at the pump\nwavelength. We also demonstrate that biphoton excitation in the image region\nyields a distribution whose axial width is approximately that of the crystal\nthickness and whose transverse width is that of the pump at the input to the\ncrystal.",
    "arxiv_id": "quant-ph/0110058",
    "authors": [
      "Magued B. Nasr",
      "Ayman F. Abouraddy",
      "Mark C. Booth",
      "Michael Kempe",
      "Ralf Wolleschensky",
      "Bahaa E. A. Saleh",
      "Alexander V. Sergienko",
      "Malvin C. Teich"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.65.023816",
    "journal_ref": "Phys. Rev. A 65, 023816 (2002)",
    "title": "Biphoton focusing for two-photon excitation",
    "url": "https://arxiv.org/abs/quant-ph/0110058"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8dab8366-b90e-44c6-ab18-6febfb40376e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}