{
  "domain": "physics-astronomy",
  "topics": [
    "optics-photonics"
  ],
  "type": "design",
  "benchmark": {
    "task": "Maximize the worst-case relative efficiency of an 8-atom metagrating library",
    "metric": {
      "name": "Worst-case relative +1-order efficiency, 450–650 nm",
      "better": "higher"
    },
    "baseline": {
      "name": "Best leaderboard library at 60 nm (Schubert, 2024)",
      "score": 0.9237060450955817
    }
  },
  "source": {
    "key": "invrs-gym",
    "name": "invrs-gym",
    "url": "https://invrs-io.github.io/gym/notebooks/challenges/meta_atom_library.html",
    "id": "meta_atom_library",
    "curator": "Martin F. Schubert (invrs.io)",
    "poser": "Martin F. Schubert, after Chen et al. (2023)",
    "status": "archived (final leaderboard, October 2025)",
    "as_of": "2026-10-20",
    "catalog": "0521c19bbd38"
  }
}