{
  "abstract": "Half-harmonic generation in microresonators with mixed $χ^{(2)}$ and $χ^{(3)}$ nonlinearities provides access to a rich landscape of two-colour soliton states and frequency combs. We numerically demonstrate the formation of both bright and topological two-colour solitons at relatively modest pump powers and phase-mismatch parameters. At higher powers and larger phase mismatches, we identify a regime where parametric down-conversion assists the formation of dark solitons in the normally dispersive pump field. While the dark-soliton core is primarily shaped by the Kerr nonlinearity, nonlinear coupling between the pump and its half-harmonic modes enables soliton excitation using a standard laser-frequency scanning technique, a capability not normally associated with dark solitons. The simulations are performed using parameters representative of lithium-niobate microresonators pumped near 775 nm and generating a half-harmonic near 1550 nm. These results reveal how the interplay of $χ^{(2)}$ and $χ^{(3)}$ nonlinearities can substantially expand the range and types of experimentally accessible soliton states in a single integrated frequency-comb platform.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.17706",
  "author_total": 4,
  "authors": [
    {
      "name": "Francesco Rinaldo Talenti"
    },
    {
      "name": "Tommi Isoniemi"
    },
    {
      "name": "Jonathan Silver"
    },
    {
      "name": "Dmitry Skryabin"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/cx7k01b8twqqc.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.17706",
  "fulltext_url": null,
  "id": "cx7k01b8twqqc",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.17706",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "openalex",
      "3107|Advanced Fiber Laser Technologies"
    ]
  ],
  "openalex": "W7169918501",
  "pdf_url": "https://arxiv.org/pdf/2607.17706",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-07",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/cx7k01b8twqqc.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:48Z",
      "native_id": "2607.17706",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.17706"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Multiple soliton regimes enabled by parametric down-conversion in $χ^{(2)}+χ^{(3)}$ microresonators",
  "title_text": "Multiple soliton regimes enabled by parametric down-conversion in χ^(2)+χ^(3) microresonators",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:48Z",
  "url": "https://research.draconitic.com/paper/cx7k01b8twqqc",
  "venue": "arXiv",
  "versions": []
}