{"paper":{"title":"Vacancy-Engineered Phonon Polaritons in a van der Waals Crystal","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.app-ph","physics.chem-ph"],"primary_cat":"physics.optics","authors_text":"H. Kumar Wickramasinghe, Joshua J. Bocanegra, Mariia Stepanova, Mashnoon A. Sakib, Maxim R. Shcherbakov, Naveed Hussain, Ruqian Wu, William Harris","submitted_at":"2023-09-11T16:02:49Z","abstract_excerpt":"Phonon-polaritons (PhPs) in low-symmetry van der Waals materials confine mid-infrared electromagnetic radiation well below the diffraction limit for nanoscale optics, sensing, and energy control. However, controlling the PhP dispersion at the nanoscale through intrinsic material properties$-$without external fields, lithography, or intercalants$-$remains elusive. Here, we demonstrate vacancy-engineered tuning of PhPs in $\\alpha$-phase molybdenum trioxide ($\\alpha$-MoO$_3$) via oxygen vacancy formation and lattice strain. Near-field nanoimaging of PhPs in processed $\\alpha$-MoO$_3$ reveals an a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2309.05574","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2309.05574/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}