{
  "abstract": "Engineering local optical chirality in planar photonic structures offers a route to selective and enhanced light-matter interactions with chiral media. Here, we introduce periodic dielectric waveguides that support chiral evanescent fields through the interaction of two nearly degenerate waveguide modes. We develop a perturbation theory for such a waveguide covered by a chiral layer, relating chirality-induced modal coupling and propagation-constant corrections to measurable intermodal power conversion and differential transmission. Whereas modal detuning confines the chiral response of a symmetric waveguide to a narrow spectral range, mode hybridization in an asymmetric waveguide creates individual eigenmodes that carry nonzero local chirality over a broad spectral range. We show that modal dichroism in realistic lossy waveguides can produce a significant background differential transmission signal. Such a background, however, can be suppressed by comparing transmission through two asymmetric waveguides with opposite structural asymmetries, allowing the chiral response to be reliably extracted. Together, these findings provide a basis for developing integrated photonic components with locally chiral fields, including waveguides, metasurfaces, and resonators.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.23630",
  "author_total": 2,
  "authors": [
    {
      "name": "Albert A. Seredin"
    },
    {
      "name": "Roman S. Savelev"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4gpp72yfa8r60.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.23630",
  "fulltext_url": null,
  "id": "4gpp72yfa8r60",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.23630",
  "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",
      "2504|Metamaterials and Metasurfaces Applications"
    ]
  ],
  "openalex": "W7222942728",
  "pdf_url": "https://arxiv.org/pdf/2610.23630",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-16",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4gpp72yfa8r60.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:32Z",
      "native_id": "2610.23630",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.23630"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Broadband chiroptical sensing with two-mode subwavelength grating waveguides",
  "title_text": "Broadband chiroptical sensing with two-mode subwavelength grating waveguides",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:28Z",
  "url": "https://research.draconitic.com/paper/4gpp72yfa8r60",
  "venue": "arXiv",
  "versions": []
}