{
  "abstract": "The control and steering of light at nanometre length scales is crucial for the development of both fundamental science and nanophotonic technologies. Recent advancements have been achieved by exploiting various crystalline anisotropies, allowing for subdiffractional and diffraction-less canalisation of energy. These studies in particular benefit from surface structuring as well as from stacking and twisting of 2D materials, whereas corresponding capabilities of anisotropic bulk crystals are rather unexplored. In this work, we show that ferroelastic twin walls - crystallographically perfect 2D-sheets that separate regions of differently oriented domains - in the distorted perovskite LaAlO₃ provide a natural platform for broadband lateral confinement of light at the nanoscale. Without fabrication processes, the electromagnetic fields localised at such walls exhibit lateral optical sizes up to 260 times smaller than the free-space wavelength. Depending on the adjacent domain orientation and frequency, the twin wall pattern preferentially concentrates or repels the electromagnetic energy, constituting a natural building block towards broadband MIR and THz nanophotonics for polaritonic circuitry.",
  "abstract_shown": true,
  "affiliations": [
    "Institute of Applied Physics, TUD Dresden University of Technology, Dresden, Germany.",
    "Würzburg-Dresden Cluster of Excellence (EXC2147) ctd.qmat - Complexity, Topology, and Dynamics in Quantum Matter, Dresden, Germany.",
    "University of Geneva, Department of Quantum Matter Physics (DQMP), Geneva, Switzerland. taboadajavier@uniovi.es.",
    "University of Geneva, Department of Quantum Matter Physics (DQMP), Geneva, Switzerland.",
    "Institute of Radiation Physics, Helmholtz-Zentrum Dresden Rossendorf, Dresden, Germany.",
    "Advanced Light Source (ALS), Lawrence Berkeley National Laboratory, Berkeley, CA, USA.",
    "Institute of Applied Physics, TUD Dresden University of Technology, Dresden, Germany. samuel.seddon@tu-dresden.de."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 16,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "J Wetzel"
    },
    {
      "affs": [
        2
      ],
      "name": "J Taboada-Gutiérrez",
      "orcid": "0000-0001-7401-9722"
    },
    {
      "affs": [
        0
      ],
      "name": "M Roeper",
      "orcid": "0009-0008-4779-7383"
    },
    {
      "affs": [
        0
      ],
      "name": "F G Kaps"
    },
    {
      "affs": [
        3
      ],
      "name": "G L Esposito"
    },
    {
      "affs": [
        3
      ],
      "name": "D Marchese",
      "orcid": "0009-0001-0064-5429"
    },
    {
      "affs": [
        0
      ],
      "name": "R Buschbeck"
    },
    {
      "affs": [
        0
      ],
      "name": "P Lenz"
    },
    {
      "affs": [
        4
      ],
      "name": "J M Klopf",
      "orcid": "0000-0002-3431-6666"
    },
    {
      "affs": [
        5
      ],
      "name": "H A Bechtel",
      "orcid": "0000-0002-7606-9333"
    },
    {
      "affs": [
        5
      ],
      "name": "S N Gilbert Corder",
      "orcid": "0000-0002-5041-8670"
    },
    {
      "affs": [
        3
      ],
      "name": "J Teyssier",
      "orcid": "0000-0002-7590-2987"
    },
    {
      "affs": [
        0
      ],
      "name": "S C Kehr",
      "orcid": "0000-0002-3857-673X"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "L M Eng",
      "orcid": "0000-0002-2484-4158"
    },
    {
      "affs": [
        3
      ],
      "name": "A B Kuzmenko",
      "orcid": "0000-0001-9574-6435"
    },
    {
      "affs": [
        6
      ],
      "name": "S D Seddon",
      "orcid": "0000-0001-8900-9308"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d6jdhz0meebk6.bib",
  "cited_by": 1,
  "doi": "10.1038/s41467-026-77689-5",
  "fulltext_url": "https://europepmc.org/articles/PMC13720113",
  "id": "d6jdhz0meebk6",
  "issns": [
    "2041-1723"
  ],
  "landing_url": "https://europepmc.org/article/MED/42957654",
  "language": "eng",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Article"
    ],
    [
      "openalex",
      "2504|Metamaterials and Metasurfaces Applications"
    ]
  ],
  "openalex": "W7140167131",
  "pdf_url": "https://europepmc.org/articles/PMC13720113?pdf=render",
  "pmcid": "PMC13720113",
  "pmid": "42957654",
  "published": "2026-09-28",
  "publisher": "Nature Publishing Group",
  "ris": "https://research.draconitic.com/paper/d6jdhz0meebk6.ris",
  "sources": [
    {
      "first_seen": "2026-11-01T00:20:44Z",
      "native_id": "MED:42957654",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42957654"
    },
    {
      "first_seen": "2026-11-02T12:23:57Z",
      "native_id": "PMC13720113",
      "source": "pmc",
      "url": "https://doi.org/10.1038/s41467-026-77689-5"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2504|Metamaterials and Metasurfaces Applications",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Ultra-high THz-field-confinement at LaAlO₃ twin walls.",
  "title_text": "Ultra-high THz-field-confinement at LaAlO₃ twin walls.",
  "type": "peer-reviewed",
  "updated_at": "2026-11-03T12:21:03Z",
  "url": "https://research.draconitic.com/paper/d6jdhz0meebk6",
  "venue": "Nature communications",
  "versions": []
}