{
  "abstract": "Thermal confinement is a key parameter in photothermal applications, as it determines the spatial extent of the region affected by the generated heat. In this work, we develop a numerical treatment to quantify thermal confinement in spherical plasmonic nanoparticles under excitation conditions ranging from ultrashort pulses to the continuous-wave regime. The model combines generalized optical heating with a finite-difference solution of the transient heat equation and explicitly accounts for finite interfacial thermal conductance. To characterize the spatial distribution of heat, we introduce a thermal confinement radius defined from the temporal temperature envelope in the surrounding medium. We demonstrate that pulse duration acts as a highly effective, tuneable parameter to govern thermal confinement. Notably, we quantitatively show that finite interfacial thermal conductance can induce deviations of up to 20% in the spatial confinement radius and over 60% in the transient thermal construct under ultrashort excitation. By comparing the characteristic dimensions of representative targeting ligands with the resulting thermal-confinement length scales, we show how pulse duration can be precisely tailored to control target heating. These results provide a unified framework for predicting nanoscale heat localization paving the way for the rational design of high precision thermoplasmonic applications.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.21698",
  "author_total": 7,
  "authors": [
    {
      "name": "Javier González-Colsa"
    },
    {
      "name": "Dolores Ortiz"
    },
    {
      "name": "José María Saiz"
    },
    {
      "name": "Alfredo Franco"
    },
    {
      "name": "Francisco González"
    },
    {
      "name": "Fernando Bresme"
    },
    {
      "name": "Pablo Albella"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2tqcwg3cr4p2e.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.21698",
  "fulltext_url": null,
  "id": "2tqcwg3cr4p2e",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.21698",
  "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.app-ph"
    ],
    [
      "arxiv",
      "physics.comp-ph"
    ],
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "openalex",
      "2204|Plasmonic and Surface Plasmon Research"
    ]
  ],
  "openalex": "W7222621312",
  "pdf_url": "https://arxiv.org/pdf/2610.21698",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2tqcwg3cr4p2e.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:50Z",
      "native_id": "2610.21698",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.21698"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.app-ph",
      "subfield": "applied-instrumentation"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.comp-ph",
      "subfield": "computational"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Thermal Confinement in Plasmonic Nanoparticles under Generalised Pulsed Illumination",
  "title_text": "Thermal Confinement in Plasmonic Nanoparticles under Generalised Pulsed Illumination",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:50Z",
  "url": "https://research.draconitic.com/paper/2tqcwg3cr4p2e",
  "venue": "arXiv",
  "versions": []
}