{
  "abstract": "The Smith-Purcell effect arises when charged particles move near a periodic structure, emitting radiation. Conventional approaches for generating chiral Smith-Purcell radiation rely on metasurface phase engineering or resonant mode interference, typically producing narrow-band, weakly chiral emission. Here, we introduce a resonance-interference-free mechanism that leverages the properties of the charged particles themselves. Using a non-chiral, non-resonant silicon grating, we demonstrate broadband, tunable Smith-Purcell radiation with high chirality, achieving a record-high degree of polarization of 0.87. This is enabled by converting the transverse spin angular momentum of electron-induced evanescent waves into a longitudinal form, producing opposite chirality at different azimuthal angles. Beam twisting or displacement offers precise control over chirality, paving the way for compact chiral light sources, advanced X-ray imaging, and integrated particle diagnostics platforms.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2605.26587",
  "author_total": 12,
  "authors": [
    {
      "name": "Juan-Feng Zhu"
    },
    {
      "name": "Fei Chen"
    },
    {
      "name": "Jun-Xuan Chen"
    },
    {
      "name": "Junkang Shan"
    },
    {
      "name": "Ayan Nussupbekov"
    },
    {
      "name": "Febiana Tjiptoharsono"
    },
    {
      "name": "Xuan Dong"
    },
    {
      "name": "Mu Wang"
    },
    {
      "name": "Cheng-Wei Qiu"
    },
    {
      "name": "Zhaogang Dong"
    },
    {
      "name": "Ruwen Peng"
    },
    {
      "name": "Lin Wu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4gf6zjmw54hj9.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.26587",
  "fulltext_url": null,
  "id": "4gf6zjmw54hj9",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.26587",
  "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.app-ph"
    ],
    [
      "arxiv",
      "physics.optics"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2605.26587",
  "pmcid": null,
  "pmid": null,
  "published": "2026-05-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4gf6zjmw54hj9.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:22Z",
      "native_id": "2605.26587",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.26587"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.app-ph",
      "subfield": "applied-instrumentation"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Observation of the Inherent Chiral Smith-Purcell Effect via Symmetry Breaking",
  "title_text": "Observation of the Inherent Chiral Smith-Purcell Effect via Symmetry Breaking",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:44Z",
  "url": "https://research.draconitic.com/paper/4gf6zjmw54hj9",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1038/s41467-026-78729-w",
      "pid": "14vtt04ch571n",
      "relation": "published-as",
      "title": "Observation of inherent chiral Smith–Purcell effect via symmetry breaking",
      "venue": "Nature Communications"
    }
  ]
}