{
  "abstract": "We present a non-paraxial design strategy based on the full ideal aberration-free phase function for a dual-layer rotational zoom metalens. By adopting the exact lens phase expression rather than the conventional parabolic approximation, this approach preserves the higher-order phase contributions critical to large-NA operation. Zooming is achieved by engineering complementary phase distributions on two metasurface layers and dynamically modulating their combined phase via controlled rotation. To realize the target phase profiles, a dielectric metasurface operating at 10 GHz is designed using ceramic cylindrical resonators arranged in a triangular lattice. A systematic parametric optimization of lattice period, cylinder diameter, and height ensures a complete 2pi phase coverage while maintaining a transmission above 85%. The resulting phase-geometry mapping establishes a reliable unit-cell library for device implementation. Leveraging this library, the dual-layer metalens is designed and its performance evaluated through finite-difference time-domain simulations. A prototype with a 300 mm aperture is fabricated and experimentally characterized using three-dimensional near-field scanning measurements. Both simulations and experiments confirm that continuous focal-length tuning is achieved as the rotation angle varies from -60deg to 60deg, corresponding to a focal-length range of 100 to 300 mm and a zoom ratio of 3:1. The device achieves a maximum NA of 0.83, and the measured focal spots remain nearly diffraction-limited. The experimentally extracted focal-length variation agrees closely with theoretical predictions and simulations.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Acta Phys. Sin., 2026, 75(10)",
  "arxiv": "2609.24171",
  "author_total": 3,
  "authors": [
    {
      "name": "Tingfeng Lei"
    },
    {
      "name": "Guanqing Shu"
    },
    {
      "name": "Xiaodong Chen"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1ft2e05tb60ty.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.24171",
  "fulltext_url": null,
  "id": "1ft2e05tb60ty",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.24171",
  "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/2609.24171",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1ft2e05tb60ty.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2609.24171",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.24171"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Dual-layer large-numerical-aperture metalenses with rotational zoom capability",
  "title_text": "Dual-layer large-numerical-aperture metalenses with rotational zoom capability",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/1ft2e05tb60ty",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.7498/aps.75.20251674",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}