{
  "abstract": "Raman optical activity (ROA) conventionally detects differences in Raman scattering associated with opposite circular-polarization states σ, providing a sensitive probe of molecular chirality. Here we show that a different handedness of light can drive ROA: the wavefront handedness encoded in the topological charge l of a focused optical vortex. Instead of using photons carrying spin angular momentum σℏ, the response is controlled by photons carrying orbital angular momentum lℏ, with the sign of l defining the optical handedness. We develop a nonparaxial theory of ROA with Laguerre-Gaussian beams and show that the Maxwell-consistent focused field allows a linearly polarized vortex beam to produce a topological-charge-dependent ROA signal from an isotropic ensemble of independent, randomly oriented chiral molecules, as in a gas or dilute solution. The response contains both electric-dipole-magnetic-dipole and electric-dipole-electric-quadrupole interference terms, establishing optical orbital angular momentum as a control parameter for chiral Raman spectroscopy.",
  "abstract_shown": true,
  "affiliations": [
    "School of Chemistry, University of East Anglia, Norwich Research Park, NorwichNR4 7TJ, United Kingdom."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 1,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Kayn A Forbes",
      "orcid": "0000-0002-8884-3496"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/chfms0cy7ds2t.bib",
  "cited_by": 0,
  "doi": "10.1021/acs.jpclett.6c02215",
  "fulltext_url": "https://europepmc.org/articles/PMC13596026",
  "id": "chfms0cy7ds2t",
  "issns": [
    "1948-7185"
  ],
  "landing_url": "https://europepmc.org/article/MED/42915485",
  "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|Orbital Angular Momentum in Optics"
    ]
  ],
  "openalex": "W7210283427",
  "pdf_url": "https://europepmc.org/articles/PMC13596026?pdf=render",
  "pmcid": "PMC13596026",
  "pmid": "42915485",
  "published": "2026-09-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/chfms0cy7ds2t.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:02Z",
      "native_id": "MED:42915485",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42915485"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3107|Orbital Angular Momentum in Optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Twisted Raman: Orbital Angular Momentum Control of Raman Optical Activity.",
  "title_text": "Twisted Raman: Orbital Angular Momentum Control of Raman Optical Activity.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:21:02Z",
  "url": "https://research.draconitic.com/paper/chfms0cy7ds2t",
  "venue": "The journal of physical chemistry letters",
  "versions": []
}