{
  "abstract": "Bound states in the continuum (BICs) provide a powerful route to optical resonances with vanishing radiation loss and enhanced light-matter interactions. Of particular interest are chiral BICs, whose resonant states exhibit intrinsic circular polarization and spin-selective radiation. Magneto-optical photonic crystals have recently been predicted to host such states through time-reversal-symmetry breaking. Here, we experimentally demonstrate chiral BICs induced by time-reversal symmetry breaking in a magneto-optical photonic crystal, where an out-of-plane magnetic field lifts a degenerate BIC pair into two nondegenerate resonances with opposite circular polarizations. Numerical simulations reveal the associated chiral phase vortices and strong spin-selective radiation, while microwave measurements confirm the predicted behavior through angle-resolved transmission spectra and pronounced broadband circular dichroism. Our results establish an experimental platform for exploring chiral BIC physics in magneto-optical photonic structures, opening new opportunities for spin-selective photonics.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Physical Review A 114, 043514 (2026)",
  "arxiv": "2609.38826",
  "author_total": 6,
  "authors": [
    {
      "name": "Hao-Chang Mo"
    },
    {
      "name": "Wen-Jin Zhang"
    },
    {
      "name": "Ze-Yu Wu"
    },
    {
      "name": "Xin-Tao He"
    },
    {
      "name": "Xiao-Dong Chen"
    },
    {
      "name": "Jian-Wen Dong"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dxdwcwkyxj0rr.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.38826",
  "fulltext_url": null,
  "id": "dxdwcwkyxj0rr",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.38826",
  "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/2609.38826",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dxdwcwkyxj0rr.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:31Z",
      "native_id": "2609.38826",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.38826"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Experimental Demonstration of Chiral Bound States in the Continuum Enabled by Time-reversal Symmetry Breaking",
  "title_text": "Experimental Demonstration of Chiral Bound States in the Continuum Enabled by Time-reversal Symmetry Breaking",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:31Z",
  "url": "https://research.draconitic.com/paper/dxdwcwkyxj0rr",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/x4bj-tynz",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}