{
  "abstract": "In this paper, a novel, to our knowledge, analytical approach is introduced for the design of a single-sided plano-convex lens (PCL) capable of terahertz (THz) flat-top beam shaping in the Fresnel region. The lens profile, derived from geometrical optics principles, integrates collimating and beam-shaping functions into a single optical surface, thereby simplifying fabrication. The efficiency of the method is demonstrated by designing two PCLs that convert a divergent Gaussian beam from a monochromatic THz source (at 100 and 200 GHz) into flat-top beams with target radii of 400 and 500 mm at distances of 3 and 4 m, respectively. The resulting fields, evaluated through analytical, integral equation, and finite element techniques, are shown to be comparable to those produced by a conventional double-sided concave-convex lens. Furthermore, the sensitivity of the design to frequency and alignment variations is investigated, confirming the robustness of this single-curvature approach for integration into practical THz imaging systems.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Appl. Opt. 65, 551-557 (2026)",
  "arxiv": "2611.06050",
  "author_total": 4,
  "authors": [
    {
      "name": "Ehsan Imanbeygi"
    },
    {
      "name": "Mohammad Hossein Koohi Ghamsari"
    },
    {
      "name": "Mehdi Ahmadi-Boroujeni"
    },
    {
      "name": "Babak Honarbakhsh"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5qm572rdmdm04.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.06050",
  "fulltext_url": null,
  "id": "5qm572rdmdm04",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.06050",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cs.SY"
    ],
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      "arxiv",
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    [
      "arxiv",
      "physics.optics"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.06050",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-04",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5qm572rdmdm04.ris",
  "sources": [
    {
      "first_seen": "2026-11-05T15:20:56Z",
      "native_id": "2611.06050",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.06050"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Single-sided lens terahertz flat-top beam shaping in the Fresnel region",
  "title_text": "Single-sided lens terahertz flat-top beam shaping in the Fresnel region",
  "type": "preprint",
  "updated_at": "2026-11-09T00:20:19Z",
  "url": "https://research.draconitic.com/paper/5qm572rdmdm04",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1364/ao.583170",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}