{
  "abstract": "Chiroptical nonlinearity is vital for modern optics and photonics. However, it remains a central challenge to obtain a material simultaneously with large second-order nonlinearity and strong nonlinear optical chirality. Here we uncover the strong chiroptical nonlinearity in COF-330-a, owing to the formation of unique chiral, polar structure with large p-electron conjugation via structural transformation. A large effective second-order nonlinear susceptibility of ~ 101 pm/V and a strong nonlinear chiroptical response (SHG-CD: -1.60 to +1.66) have been demonstrated in individual COF-330-a microcrystals, transcending the performance trade-off limitation in conventional chiroptical materials. These findings open a new avenue for designing nonlinear chiroptical materials which harness the duality of polarity and chirality and chemical versatility of COFs.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.13728",
  "author_total": 7,
  "authors": [
    {
      "name": "Yile Zhang"
    },
    {
      "name": "Lei Wei"
    },
    {
      "name": "Sixue Tang"
    },
    {
      "name": "Yuhang Li"
    },
    {
      "name": "Yanhang Ma"
    },
    {
      "name": "Yue-Biao Zhang"
    },
    {
      "name": "Xiaoqin Shen"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4m3yxjg6ga7k4.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.13728",
  "fulltext_url": null,
  "id": "4m3yxjg6ga7k4",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.13728",
  "language": null,
  "licence": "CC-BY-NC-SA-4.0",
  "licence_label": "CC BY-NC-SA 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "openalex",
      "2504|Nonlinear Optical Materials Research"
    ]
  ],
  "openalex": "W7221569622",
  "pdf_url": "https://arxiv.org/pdf/2610.13728",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4m3yxjg6ga7k4.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:50Z",
      "native_id": "2610.13728",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.13728"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Chiroptical Nonlinearity Found in Covalent Organic Frameworks",
  "title_text": "Chiroptical Nonlinearity Found in Covalent Organic Frameworks",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:50Z",
  "url": "https://research.draconitic.com/paper/4m3yxjg6ga7k4",
  "venue": "arXiv",
  "versions": []
}