{
  "abstract": "Chemical characterization of microscopic samples often requires resolving multiple, widely separated vibrational absorption bands, including their positions and spectral shapes. Photothermal microspectroscopy provides a route to localized vibrational measurements by detecting absorption-induced thermal responses with a separate optical probe. However, rapid acquisition of broadband photothermal spectra remains challenging when spectral information is collected through sequential wavelength tuning. Here, we develop a supercontinuum (SC)-driven Fourier-transform photothermal (FT-PT) microspectroscopy platform that combines broadband near-infrared excitation with rapid-scan interferometric acquisition for localized vibrational measurements. In this approach, an interferometrically modulated SC pump induces wavelength-dependent photothermal responses in the sample, which are detected through a co-propagating visible probe beam and reconstructed by Fourier transformation. Using a 1.65-2.35 um spectral window, we demonstrate broadband photothermal spectra of aqueous samples with acquisition rates of approximately one spectrum per second. The system simultaneously resolves multiple molecular absorption features in a water-dimethyl sulfoxide mixture and reproduces the near-infrared absorption characteristics of liquid water with high spectral fidelity. Extending beyond homogeneous liquids, a dark-field detection configuration enables broadband photothermal spectroscopy of an individual 6 um polystyrene particle in an aqueous environment. This SC-based FT-PT microspectroscopy approach provides a rapid and broadband platform for localized vibrational characterization of liquid and microscopic samples, enabling chemical analysis with microscale spatial selectivity.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.32718",
  "author_total": 5,
  "authors": [
    {
      "name": "Senyu Wang"
    },
    {
      "name": "Zicong Xu"
    },
    {
      "name": "Kazuki Hashimoto"
    },
    {
      "name": "Jianfeng Li"
    },
    {
      "name": "Takuro Ideguchi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d441e7h838d0m.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.32718",
  "fulltext_url": null,
  "id": "d441e7h838d0m",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.32718",
  "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",
      "1304|Spectroscopy Techniques in Biomedical and Chemical Research"
    ]
  ],
  "openalex": "W7223669176",
  "pdf_url": "https://arxiv.org/pdf/2610.32718",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-23",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/d441e7h838d0m.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:15Z",
      "native_id": "2610.32718",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.32718"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Supercontinuum-driven broadband Fourier-transform photothermal microspectroscopy",
  "title_text": "Supercontinuum-driven broadband Fourier-transform photothermal microspectroscopy",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:15Z",
  "url": "https://research.draconitic.com/paper/d441e7h838d0m",
  "venue": "arXiv",
  "versions": []
}