{
  "abstract": "A persistent challenge in plasmonic upconversion is decoupling pump-field enhancement from emission-side local-density-of-optical-states (LDOS) engineering to achieve selective band manipulation. Here, we show that a corrugated SU₈/Au/Al₂O₃ grating coated with a NaYF 4 : Yb/Er upconversion nanoparticle (UCNP) monolayer realizes a truly band-selective platform. A broad plasmonic resonance near 670 nm modulates the red Er³⁺ decay rate by ±15% as a function of the Al₂O₃ spacer thickness, while leaving the green transition experimentally invariant (< 1% change). Simultaneously, the 980 nm pump field is monotonically suppressed below free-space levels, ensuring that steady-state and time-resolved observables cleanly probe the emission-side LDOS without pump interference. We analyze this system using a coupled electromagnetic-kinetic framework that integrates finite-difference time-domain (FDTD) calculations of Purcell factors and pump fields with a six-level Yb/Er rate-equation model. The framework quantitatively reproduces the 670 nm plasmonic resonance, the red-band decay-rate modulation, and the monotonic decrease of the green/red intensity ratio. Crucially, the model serves as a powerful diagnostic tool: it overpredicts a green-band rate reduction, but systematic parametric testing rules out geometric (apex smoothing) and material (grain-boundary damping, interband loss) imperfections as the cause. Instead, it isolates the residual discrepancy to measurement-versus-model factors (finiteaperture angular averaging) and missing non-radiative kinetic channels, establishing a clear roadmap for the rational design and validation of future plasmonic-UCNP architectures.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: ACS Photonics (2026) 13 (17): 5119-5128",
  "arxiv": "2605.04872",
  "author_total": 6,
  "authors": [
    {
      "name": "Yuxiang Zhang"
    },
    {
      "name": "Mayte Gómez-Castaño"
    },
    {
      "name": "Agustín Mihi"
    },
    {
      "name": "Serge Ravaine"
    },
    {
      "name": "Xiaogang Liu"
    },
    {
      "name": "Renaud Vallée"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d5ex2gjteefe6.bib",
  "cited_by": 0,
  "doi": "10.1021/acsphotonics.6c01114",
  "fulltext_url": null,
  "id": "d5ex2gjteefe6",
  "issns": [
    "2330-4022"
  ],
  "landing_url": "https://hal.science/hal-05760805v1",
  "language": "en",
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.soft"
    ],
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      "arxiv",
      "physics.optics"
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      "1.phys.phys"
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      "2.phys.phys.phys-optics"
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    [
      "openalex",
      "2505|Luminescence Properties of Advanced Materials"
    ]
  ],
  "openalex": "W7160541571",
  "pdf_url": "https://hal.science/hal-05760805/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-24",
  "publisher": "American Chemical Society",
  "ris": "https://research.draconitic.com/paper/d5ex2gjteefe6.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:39Z",
      "native_id": "hal-05760805",
      "source": "hal",
      "url": "https://hal.science/hal-05760805v1"
    },
    {
      "first_seen": "2026-10-30T12:22:19Z",
      "native_id": "2605.04872",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.04872"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.soft",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Band-Selective LDOS Engineering of Yb/Er Upconversion: an Electromagnetic-Kinetic Diagnostic Framework",
  "title_text": "Band-Selective LDOS Engineering of Yb/Er Upconversion: an Electromagnetic-Kinetic Diagnostic Framework",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:22:19Z",
  "url": "https://research.draconitic.com/paper/d5ex2gjteefe6",
  "venue": "ACS photonics",
  "versions": [
    {
      "doi": "10.1021/acsphotonics.6c01114",
      "pid": "d5ex2gjteefe6",
      "relation": "published-as",
      "title": "Band-Selective LDOS Engineering of Yb/Er Upconversion: an Electromagnetic-Kinetic Diagnostic Framework",
      "venue": "ACS photonics"
    }
  ]
}