{
  "abstract": "MXenes have attracted considerable interest for integrated nonlinear photonics owing to their broadband optical response and chemical tunability, yet investigations have focused predominantly on Ti-based compositions, leaving the nonlinear potential of double-transition-metal MXenes largely unexplored. Here we quantify the nonlinear optical response of the double-transition-metal MXene \\ce{Mo2TiC2T_x} and demonstrate its functionality as a waveguide-integrated nonlinear activation element for neuromorphic photonics. Z-scan measurements at \\SI{800}{\\nano\\metre} reveal strong saturable absorption in films of two different thicknesses, yielding effective nonlinear absorption coefficients ($β_\\mathrm{eff}$) between approximately $-2.69\\times10^{3}$ and $-0.88\\times10^{3}$ \\si{\\centi\\metre\\per\\giga\\watt}, with the nonlinear response decreasing at higher excitation intensities. The extracted nonlinear absorption is approximately one order of magnitude larger than that reported for \\ce{Ti3C2T_x} MXene under comparable conditions. We integrate an ultrathin \\ce{Mo2TiC2T_x} MXene layer onto a silicon rib waveguide to realize a compact nonlinear optical activation function, which, when implemented in a neural-network emulator, achieves $98.39\\%$ classification accuracy on the MNIST benchmark. This work expands the MXene material platform beyond Ti-based compositions and establishes double-transition-metal MXenes as promising candidates for high-performance integrated nonlinear photonic and neuromorphic computing technologies.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.19849",
  "author_total": 8,
  "authors": [
    {
      "name": "Shadad Watad"
    },
    {
      "name": "Aviad Katiyi"
    },
    {
      "name": "Bar Favelukis"
    },
    {
      "name": "Muhammad Sharif Uddin"
    },
    {
      "name": "Anupma Thakur"
    },
    {
      "name": "Maxim Sokol"
    },
    {
      "name": "Babak Anasori"
    },
    {
      "name": "Alina Karabchevsky"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5rbsswmtnb77w.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.19849",
  "fulltext_url": null,
  "id": "5rbsswmtnb77w",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.19849",
  "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",
      "2505|MXene and MAX Phase Materials"
    ]
  ],
  "openalex": "W7213591389",
  "pdf_url": "https://arxiv.org/pdf/2609.19849",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5rbsswmtnb77w.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:19Z",
      "native_id": "2609.19849",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.19849"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Mo2TiC2Tx MXene Saturable Absorption for Neural Networks on a Chip",
  "title_text": "Mo2TiC2Tx MXene Saturable Absorption for Neural Networks on a Chip",
  "type": "preprint",
  "updated_at": "2026-10-30T12:22:19Z",
  "url": "https://research.draconitic.com/paper/5rbsswmtnb77w",
  "venue": "arXiv",
  "versions": []
}