{
  "annotation_id": "cafe5e2a-9988-46a6-81f8-1e1e36cf2b7e",
  "date_created": "2026-02-17T05:53:08.512000Z",
  "date_modified": "2026-02-17T05:53:08.512000Z",
  "file_hash": "c9b0c6ebe57d52b1fce86b68730a4599079ad0cfa8b1dbaeddbec7f7e370dd5b",
  "private": false,
  "record": {
    "abstract": "Bound states in the continuum (BICs) have greatly impacted our ability to manipulate light-matter interaction at the nanoscale. However, in periodic structures, BICs are typically realized below the diffraction limit, thus leaving a broad spectral domains largely unexplored. Here, we introduce a new type of at-$\\Gamma$ BICs of photonic crystal (PhC) slabs supporting higher diffraction orders, which we call hybrid BICs (h-BICs), whereby symmetry protection and parameter tuning are utilized to suppress light emission in the zeroth- and higher-diffraction orders, respectively. By tuning certain structural parameters of the PhC slab, we fully characterize the dynamics of the topological structure of these h-BICs, including the generation, merging, splitting, and annihilation of circularly polarized states. We further show that the relative amount of light radiated in the first-order diffraction channels can be effectively controlled by simply breaking the $C_{4v}$ symmetry of the PhC slab. Our findings reveal a versatile approach to realize new types of BICs above the diffraction limit, and could potentially inspire new efforts towards development of novel photonic nanodevices, such as multi vortex-beam generators, frequency converters, and lasers.",
    "arxiv_id": "2601.06983",
    "authors": [
      "Ji Tong Wang",
      "Nicolae C. Panoiu"
    ],
    "categories": [
      "physics.optics"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "title": "Hybrid Bound States in the Continuum beyond Diffraction Limit",
    "url": "https://arxiv.org/abs/2601.06983",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8c8dfd6d-df3b-44f9-bf10-7ec59e07414d",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}