{
  "abstract": "The duration of isolated attosecond pulses created via high-order harmonic generation is determined by the number of optical cycles in the driving laser. Achieving shorter attosecond soft x-ray pulses requires minimizing the number of cycles while maintaining a high pulse energy. Here, we demonstrate a carrier-envelope-phase-stable, 100-mJ-class sub-cycle mid-infrared laser that produces a supercontinuum coherent soft-x-ray with unprecedented bandwidth. The system delivers 50-mJ, 6.7-fs (0.88-cycle) pulses at a center wavelength of 2.26 μm-over two orders of magnitude more energetic than any previous sub-cycle laser. We applied the system to high-order harmonic generation and compared the results to simulations based on the three-dimensional time-dependent Schrödinger equation to identify unique features of sub-cycle lasers. This work represents a decisive step toward high-energy half-cycle lasers and high-energy single-digit attosecond soft x-ray pulses that can be used to probe matter and light-matter interactions at previously inaccessible temporal resolutions.",
  "abstract_shown": true,
  "affiliations": [
    "Extreme Photonics Research Team, RIKEN Center for Advanced Photonics, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 Japan."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Kaito Nishimiya",
      "orcid": "0000-0002-2403-1499"
    },
    {
      "affs": [
        0
      ],
      "name": "Rambabu Rajpoot",
      "orcid": "0000-0002-2196-6133"
    },
    {
      "affs": [
        0
      ],
      "name": "Eiji J. Takahashi",
      "orcid": "0000-0003-1672-1171"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6brnxycy5d56m.bib",
  "cited_by": 0,
  "doi": "10.1126/sciadv.aed5357",
  "fulltext_url": "https://europepmc.org/articles/PMC13685965",
  "id": "6brnxycy5d56m",
  "issns": [
    "2375-2548"
  ],
  "landing_url": "https://www.science.org/doi/10.1126/sciadv.aed5357",
  "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": [
    [
      "openalex",
      "3107|Laser-Matter Interactions and Applications"
    ]
  ],
  "openalex": "W4415914912",
  "pdf_url": "https://europepmc.org/articles/PMC13685965?pdf=render",
  "pmcid": "PMC13685965",
  "pmid": "42905823",
  "published": "2026-10-21",
  "publisher": "American Association for the Advancement of Science (AAAS)",
  "ris": "https://research.draconitic.com/paper/6brnxycy5d56m.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:41Z",
      "native_id": "10.1126/sciadv.aed5357",
      "source": "crossref",
      "url": "https://www.science.org/doi/10.1126/sciadv.aed5357"
    },
    {
      "first_seen": "2026-10-30T12:19:53Z",
      "native_id": "MED:42905823",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42905823"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3107|Laser-Matter Interactions and Applications",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Towards intense single-digit attosecond pulses with a 100-mJ-class mid-infrared sub-cycle laser",
  "title_text": "Towards intense single-digit attosecond pulses with a 100-mJ-class mid-infrared sub-cycle laser",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:19:53Z",
  "url": "https://research.draconitic.com/paper/6brnxycy5d56m",
  "venue": "Science Advances",
  "versions": []
}