{
  "annotation_id": "3d03a408-cf3a-491a-b996-74c0eef92249",
  "date_created": "2026-03-02T18:01:14.723000Z",
  "date_modified": "2026-03-02T18:01:14.723000Z",
  "file_hash": "43125a0eb2d1e08b3adb3842a165038ba6e9fb031fdf163d527b7ddf904fe3b4",
  "private": false,
  "record": {
    "abstract": "We apply the technique of far-field interferometry to measure the properties\nof surface waves generated by two-dimensional (2D) single subwavelength\nslit-groove structures on gold films. The effective surface index of refraction\nmeasured for the surface wave propagating over a distance of more than 12\nmicrons is determined to be 1.016 with a measurement uncertainty of 0.004, to\nwithin experimental uncertainty of the expected bound surface plasmon-polariton\n(SPP) value for a Au/Air interface of 1.018. We compare these measurements to\nfinite-difference-time-domain (FDTD) numerical simulations of the optical field\ntransmission through these devices. We find excellent agreement between the\nmeasurements and the simulations for the surface index of refraction. The\nmeasurements also show that the surface wave propagation parameter exhibits\ntransient behavior close to the slit, evolving smoothly from greater values\nasymptotically toward the value expected for the SPP over the first 2-3 microns\nof slit-groove distance. This behavior is confirmed by the FDTD simulations.",
    "arxiv_id": "physics/0612001",
    "authors": [
      "F. Kalkum",
      "G. Gay",
      "O. Alloschery",
      "J. Weiner",
      "H. J. Lezec",
      "Y. Xie",
      "M. Mansuripur"
    ],
    "categories": [
      "physics.optics"
    ],
    "doi": "10.1364/OE.15.002613",
    "title": "Surface-wave interferometry on single subwavelength slit-groove   structures fabricated on gold films",
    "url": "https://arxiv.org/abs/physics/0612001"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "59e87f3b-c8ea-44c4-8511-3eb90dbe3db2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}