{
  "abstract": "All-dielectric metasurfaces supporting quasi-bound states in the continuum (qBICs) have emerged as powerful platforms for biosensing, yet their operation remains largely concentrated in the visible and near-infrared regimes. Extending these resonances into the deep-ultraviolet (DUV) to probe the intrinsic electronic absorption of biomolecules presents substantial material and nanofabrication challenges. Here, we experimentally demonstrate a hafnium dioxide (HfO$_{2}$) metasurface supporting DUV qBICs in the wavelength range from 225 nm to 340 nm with quality factors reaching 500. We further demonstrate its refractive index sensing capabilities through integration with a microfluidic cell and optical characterization in reflection mode. We show that the introduction of an aqueous buffer leads to a further quality factor enhancement. Achieving a sensitivity of up to approximately 60 nm/RIU and an operational figure of merit of 40 $\\mathrm{RIU}^{-1}$, this low-loss HfO$_{2}$ metasurface provides a robust foundation for label-free DUV biosensing.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.08733",
  "author_total": 7,
  "authors": [
    {
      "name": "Beáta Idesová"
    },
    {
      "name": "Alexander A. Antonov"
    },
    {
      "name": "Lina Rohrer"
    },
    {
      "name": "Leonardo de Souza Menezes"
    },
    {
      "name": "Andreas Tittl"
    },
    {
      "name": "Tomáš Šikola"
    },
    {
      "name": "Filip Ligmajer"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/b1fpnnbymvs1d.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.08733",
  "fulltext_url": null,
  "id": "b1fpnnbymvs1d",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.08733",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mes-hall"
    ],
    [
      "arxiv",
      "physics.optics"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.08733",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/b1fpnnbymvs1d.ris",
  "sources": [
    {
      "first_seen": "2026-11-10T06:21:04Z",
      "native_id": "2611.08733",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.08733"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Deep-UV All-dielectric qBIC Metasurface for Refractive Index Sensing",
  "title_text": "Deep-UV All-dielectric qBIC Metasurface for Refractive Index Sensing",
  "type": "preprint",
  "updated_at": "2026-11-10T06:21:04Z",
  "url": "https://research.draconitic.com/paper/b1fpnnbymvs1d",
  "venue": "arXiv",
  "versions": []
}