{
  "abstract": "Precise and high efficiency concentration of mid-infrared (mid-IR) light into sub-wavelength volumes is essential for probing low-energy excitations and achieving strong field enhancements, which is hindered by absorption losses and coupling inefficiencies at long wavelengths. Here, we introduce a diamond-based metal-insulator-metal campanile probe that adiabatically compresses free-space mid-infrared light (10 μm) into ≈ 0.7 μm domain. Integrated into a scanning photovoltage microscope, the probe enables sub-wavelength mapping of locally driven photocurrents in graphene, resolving polarization-dependent and contact-sensitive responses at energies down to ≈ 0.1 eV. Experiments reveal a photocurrent signal density enhancement of 10 ³ , coupling light power efficiencies above 1%, and an 18-fold increase in near-field light flux density, in agreement with numerical simulations. Operation of the probe with quantum cascade and free-electron lasers demonstrates a robust, spectrally tunable platform for high-resolution exploration of low-energy carrier dynamics in atomically thin materials, opening opportunities for mid-IR optoelectronics and quantum photonics.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 15,
  "authors": [
    {
      "name": "Rajasekhar Medapalli",
      "orcid": "0000-0002-0168-1990"
    },
    {
      "name": "Nathan D. Cottam"
    },
    {
      "name": "Khushboo Agarwal"
    },
    {
      "name": "Benjamin T. Dewes"
    },
    {
      "name": "Nils Dessmann"
    },
    {
      "name": "Sergio Gonzalez-Munoz"
    },
    {
      "name": "Wenjing Yan",
      "orcid": "0000-0003-4176-195X"
    },
    {
      "name": "Vaidotas Mišeikis",
      "orcid": "0000-0001-6263-4250"
    },
    {
      "name": "Sergey Kafanov"
    },
    {
      "name": "Rostislav V. Mikhaylovskiy",
      "orcid": "0000-0003-3780-0872"
    },
    {
      "name": "Samuel P. Jarvis",
      "orcid": "0000-0003-4031-1519"
    },
    {
      "name": "Camilla Coletti",
      "orcid": "0000-0002-8134-7633"
    },
    {
      "name": "Britta Redlich",
      "orcid": "0000-0002-7770-9531"
    },
    {
      "name": "Amalia Patanè",
      "orcid": "0000-0003-3015-9496"
    },
    {
      "name": "Oleg V. Kolosov",
      "orcid": "0000-0003-3278-9643"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4q475qhndazt0.bib",
  "cited_by": 0,
  "doi": "10.1038/s42005-026-02954-4",
  "fulltext_url": null,
  "id": "4q475qhndazt0",
  "issns": [
    "2399-3650"
  ],
  "landing_url": "https://www.nature.com/articles/s42005-026-02954-4",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [],
  "openalex": null,
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-03",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/4q475qhndazt0.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:20Z",
      "native_id": "10.1038/s42005-026-02954-4",
      "source": "feed-nature",
      "url": "https://www.nature.com/articles/s42005-026-02954-4"
    },
    {
      "first_seen": "2026-11-03T12:20:23Z",
      "native_id": "10.1038/s42005-026-02954-4",
      "source": "crossref",
      "url": "https://www.nature.com/articles/s42005-026-02954-4"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "journal-openalex:3107|Topological Materials and Phenomena",
      "subfield": "amo"
    }
  ],
  "title": "Sub-wavelength mid-infrared imaging of locally driven photocurrents using diamond campanile probes",
  "title_text": "Sub-wavelength mid-infrared imaging of locally driven photocurrents using diamond campanile probes",
  "type": "peer-reviewed",
  "updated_at": "2026-11-05T00:20:38Z",
  "url": "https://research.draconitic.com/paper/4q475qhndazt0",
  "venue": "Communications Physics",
  "versions": []
}