{
  "abstract": "The reconfigurable generation of complex structured terahertz (THz) fields, and vector beams in particular, remains a significant challenge. Here, we propose a novel all-dielectric cascaded-metasurface scheme for the reconfigurable generation of THz spiral vector beams. By combining an isotropic phase-compensation layer with an anisotropic circular-polarization-sensitive layer, together with a new phase design tailored to spiral beams, we achieve independent control of the left- and right-handed circularly polarized (LCP and RCP) components through the relative rotation angle between the two layers. Under linearly polarized THz wave illumination, THz vector beams with switchable spiral numbers of 1-3 and reversible circular-polarization handedness are demonstrated at frequencies around 0.9 THz. Moreover, owing to the longitudinal evolution characteristic of spiral beams, the three generated THz vector beams exhibit azimuthal rotations of 279.9°, 125.7° and 75.5°, respectively, along the propagation direction. Such complex THz vector beams, which combine reconfigurability with longitudinal evolution, are expected to find applications in emerging fields such as next-generation wireless communications and THz imaging. The proposed generation scheme also offers a useful reference for the reconfigurable generation of high-dimensional vector beams.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.41392",
  "author_total": 8,
  "authors": [
    {
      "name": "Hongjun Chen"
    },
    {
      "name": "Yuxin Tang"
    },
    {
      "name": "Jianming Li"
    },
    {
      "name": "Jitao Li"
    },
    {
      "name": "Li Luo"
    },
    {
      "name": "Tingting Tang"
    },
    {
      "name": "Jie Li"
    },
    {
      "name": "Jianquan Yao"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/53g5cg3y4e661.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.41392",
  "fulltext_url": null,
  "id": "53g5cg3y4e661",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.41392",
  "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",
      "physics.optics"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.41392",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/53g5cg3y4e661.ris",
  "sources": [
    {
      "first_seen": "2026-11-02T12:21:15Z",
      "native_id": "2610.41392",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.41392"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Reconfigurable Generation of Terahertz Spiral Vector Beams Based on All-Dielectric Cascaded Metasurfaces",
  "title_text": "Reconfigurable Generation of Terahertz Spiral Vector Beams Based on All-Dielectric Cascaded Metasurfaces",
  "type": "preprint",
  "updated_at": "2026-11-04T15:20:51Z",
  "url": "https://research.draconitic.com/paper/53g5cg3y4e661",
  "venue": "arXiv",
  "versions": []
}