{
  "abstract": "Optically bistable materials promise technological advances in optical information processing, memristive devices, and multiparametric sensing. However, optical bistability is predominantly observed under cryogenic conditions or is governed by subtle thermo-optical nonlinearities. Here, we report on Ho3+-activated nanocrystals that exhibit cavity-free intrinsic optical bistability (IOB) at ambient conditions. Non-thermal IOB stems from a cross-coupled photon avalanche (XPA) mechanism enabled by a low-phonon-energy double-perovskite host, which reduces nonradiative losses and facilitates excited-state population via XPA, even when the pump intensity is below threshold. Time-resolved luminescence measurements support the proposed XPA, as evidenced by a double-rise profile consistent with two reservoir states interlocked in energy looping. IOB with high-contrast photoswitching (up to 46 dB) is observed at room temperature across multiple visible emission lines, enabling wavelength-division multiplexing and compatibility with common detectors. IOB is preserved across nano- to microscale crystals and different double-perovskite compositions, broadly enabling information photonics and advanced sensing.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.32032",
  "author_total": 6,
  "authors": [
    {
      "name": "Eva Conour"
    },
    {
      "name": "Jacob Wojcik"
    },
    {
      "name": "Jory Sanders"
    },
    {
      "name": "Abigale Puccini"
    },
    {
      "name": "Trey Stephens-Cherry"
    },
    {
      "name": "Artiom Skripka"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bex3jmrxwjeeb.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.32032",
  "fulltext_url": null,
  "id": "bex3jmrxwjeeb",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.32032",
  "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",
      "cond-mat.mtrl-sci"
    ],
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "openalex",
      "2505|Luminescence Properties of Advanced Materials"
    ]
  ],
  "openalex": "W7223693435",
  "pdf_url": "https://arxiv.org/pdf/2610.32032",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-23",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bex3jmrxwjeeb.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:15Z",
      "native_id": "2610.32032",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.32032"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Cross-coupled photon avalanche drives room-temperature intrinsic optical bistability",
  "title_text": "Cross-coupled photon avalanche drives room-temperature intrinsic optical bistability",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:15Z",
  "url": "https://research.draconitic.com/paper/bex3jmrxwjeeb",
  "venue": "arXiv",
  "versions": []
}