{
  "abstract": "In-plane anisotropy of 2D materials and their heterostructures provides an essential degree of freedom for enabling direction-selective physical responses. However, realizing anisotropic optical responses in interlayer exciton (ILE) of type-II van der Waals heterostructures has remained elusive, as most heterostructures rely on high-symmetry group-VI transition metal dichalcogenides, and attempts to introduce low-symmetry layers are hindered by interlayer momentum mismatch leading to inefficient radiative recombination. Here, we demonstrate anisotropic ILE emission in ReS2/WS2 enabled by Γ-point momentum matching. Polarization-resolved photoluminescence (PL) reveals three distinct ILE peaks, appearing at 1.37-1.42 eV for 1L-ReS2/2L-WS2 and 1.32-1.37 eV for 2L-ReS2/2L-WS2. Time-resolved, power- and temperature-dependent PL measurements, together with first-principles many-body calculations, confirm strongly anisotropic interlayer excitons from a direct Γ-point interlayer bandgap. Furthermore, ILE intensity is independent of excitation polarization due to dominant WS2 absorption, providing a stable exciton supply for exciton transport. These findings position momentum-matched anisotropic-isotropic heterostructures as a platform for polarization-selective optoelectronics and anisotropic excitonics.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Mechanical and Aerospace Engineering, University of California, Irvine, Irvine, California92697, United States.",
    "Department of Physics, Yonsei University, Seoul03722, Korea.",
    "Department of Physics and Center for Nano Materials, Sogang University, Seoul04107, Korea.",
    "Department of Optical Engineering, Kongju National University, Cheonan31080, Korea.",
    "Department of Materials Science and Engineering, University of California, Irvine, Irvine, California92697, United States."
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Tae Keun Yun",
      "orcid": "0000-0002-1531-1712"
    },
    {
      "affs": [
        2
      ],
      "name": "Byeongchan Lee"
    },
    {
      "affs": [
        0,
        3
      ],
      "name": "Soyeong Kwon"
    },
    {
      "affs": [
        1
      ],
      "name": "Jieun Yeon",
      "orcid": "0009-0003-5448-4186"
    },
    {
      "affs": [
        1
      ],
      "name": "Doohee Cho",
      "orcid": "0000-0002-0939-3731"
    },
    {
      "affs": [
        2
      ],
      "name": "Young Woo Choi",
      "orcid": "0000-0003-4725-1299"
    },
    {
      "affs": [
        1
      ],
      "name": "Kwanpyo Kim",
      "orcid": "0000-0001-8497-2330"
    },
    {
      "affs": [
        0,
        4
      ],
      "name": "SungWoo Nam",
      "orcid": "0000-0002-9719-7203"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/cmebqpv13hc0w.bib",
  "cited_by": 0,
  "doi": "10.1021/acsnano.6c11574",
  "fulltext_url": "https://europepmc.org/articles/PMC13629670",
  "id": "cmebqpv13hc0w",
  "issns": [
    "1936-0851",
    "1936-086X"
  ],
  "landing_url": "https://europepmc.org/article/MED/42915760",
  "language": "eng",
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2505|2D Materials and Applications"
    ]
  ],
  "openalex": "W7213524238",
  "pdf_url": "https://europepmc.org/articles/PMC13629670?pdf=render",
  "pmcid": "PMC13629670",
  "pmid": "42915760",
  "published": "2026-09-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/cmebqpv13hc0w.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:02Z",
      "native_id": "MED:42915760",
      "source": "europepmc",
      "url": "https://europepmc.org/article/MED/42915760"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|2D Materials and Applications",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Anisotropic Γ-Valley Interlayer Excitonic Emission in Anisotropic-Isotropic 2D Heterostructures.",
  "title_text": "Anisotropic Γ-Valley Interlayer Excitonic Emission in Anisotropic-Isotropic 2D Heterostructures.",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:21:02Z",
  "url": "https://research.draconitic.com/paper/cmebqpv13hc0w",
  "venue": "ACS nano",
  "versions": []
}