{
  "abstract": "Photonic pseudospins enable selective excitation and routing of light, but perturbations that mix opposite pseudospins can induce backscattering in helical edge channels. Here, we experimentally demonstrate pseudospin-locked chiral edge transport in gyromagnetic photonic crystals, combining pseudospin selectivity with nonreciprocal unidirectional propagation. By jointly engineering lattice deformation and magnetic bias, we control dipolar-quadrupolar band inversions and construct interfaces supporting pseudospin-selective chiral channels. Microwave near-field and transmission measurements reveal a single chiral edge branch that is selectively excited by only one source handedness and exhibits pronounced nonreciprocal transport. Extending this mechanism to multidomain structures, we combine two pseudospin channels into a common waveguide, separate them into distinct outputs, and route them through intersecting interfaces. These configurations realize a nonreciprocal photonic pseudospin multiplexer and demultiplexer, together with a waveguide crossing exhibiting average measured crosstalk of -14.1 and -15.8 dB for its two input channels. Our results present an experimental route to integrating pseudospin-selective channel control with chiral edge transport, providing a foundation for nonreciprocal photonic networks that use pseudospin to organize and route multiple wave channels.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.04827",
  "author_total": 4,
  "authors": [
    {
      "name": "Chengle Fan"
    },
    {
      "name": "Kaizhou Shi"
    },
    {
      "name": "Xiang Xi"
    },
    {
      "name": "Zhen Gao"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1gzsncbrtv0rp.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.04827",
  "fulltext_url": null,
  "id": "1gzsncbrtv0rp",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.04827",
  "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/2611.04827",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1gzsncbrtv0rp.ris",
  "sources": [
    {
      "first_seen": "2026-11-04T15:21:25Z",
      "native_id": "2611.04827",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.04827"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Observation of pseudospin-locked chiral edge transport in gyromagnetic photonic crystals",
  "title_text": "Observation of pseudospin-locked chiral edge transport in gyromagnetic photonic crystals",
  "type": "preprint",
  "updated_at": "2026-11-06T18:21:01Z",
  "url": "https://research.draconitic.com/paper/1gzsncbrtv0rp",
  "venue": "arXiv",
  "versions": []
}