{
  "abstract": "SiN photonic crystal (PhC) cavities are promising platforms for nonlinear and quantum photonics because of their wide transparency window, CMOS compatibility, and negligible two-photon absorption. However, realizing high-Q/V cavities remains challenging because of the relatively low refractive index of SiN. Here, we employ inverse design to optimize a two-dimensional SiN PhC cavity and experimentally demonstrate a quality factor of approximately 80,000, the highest reported for a near-stoichiometric SiN 2D PhC cavity. Furthermore, both second- and third-harmonic generation are observed from the same cavity, providing experimental evidence of strong optical confinement and large Q/V. Our results establish inverse-designed SiN PhC cavities as a promising platform for nonlinear photonics and future heterogeneous integrated photonic devices.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.13261",
  "author_total": 10,
  "authors": [
    {
      "name": "M. Takiguchi"
    },
    {
      "name": "P. Heidt"
    },
    {
      "name": "X. Z. Lim"
    },
    {
      "name": "J. Zöllner"
    },
    {
      "name": "S. Yanagimoto"
    },
    {
      "name": "K. Nakayama"
    },
    {
      "name": "T. Aihara"
    },
    {
      "name": "M. Ono"
    },
    {
      "name": "H. Sumikura"
    },
    {
      "name": "M. Notomi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7rnkb6q7xwq9z.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.13261",
  "fulltext_url": null,
  "id": "7rnkb6q7xwq9z",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.13261",
  "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|Photonic Crystals and Applications"
    ]
  ],
  "openalex": "W7203503141",
  "pdf_url": "https://arxiv.org/pdf/2608.13261",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7rnkb6q7xwq9z.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:50Z",
      "native_id": "2608.13261",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.13261"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Inverse-Designed High-Q and Small-Mode-Volume Silicon Nitride Photonic Crystal Cavities for Second- and Third-Harmonic Generation",
  "title_text": "Inverse-Designed High-Q and Small-Mode-Volume Silicon Nitride Photonic Crystal Cavities for Second- and Third-Harmonic Generation",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:50Z",
  "url": "https://research.draconitic.com/paper/7rnkb6q7xwq9z",
  "venue": "arXiv",
  "versions": []
}