{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:R4LNBJZXPE744OIOMJGS75H2DQ","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"44cc4e5cf09b89fc012b4ef78b5ff6670489f1b0fbf75c779f1ad8a6336b601e","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"physics.optics","submitted_at":"2018-05-21T21:20:18Z","title_canon_sha256":"1fdc11e8ff542c6fbb5bb1767f439a096c51eded4623cc293586466f4f377f0a"},"schema_version":"1.0","source":{"id":"1805.08292","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.08292","created_at":"2026-05-18T00:01:15Z"},{"alias_kind":"arxiv_version","alias_value":"1805.08292v1","created_at":"2026-05-18T00:01:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.08292","created_at":"2026-05-18T00:01:15Z"},{"alias_kind":"pith_short_12","alias_value":"R4LNBJZXPE74","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"R4LNBJZXPE744OIO","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"R4LNBJZX","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:8e049ee1b3dd744f2d3e757ff7b35086b7d8c19683b3507ffb11811f82e669b9","target":"graph","created_at":"2026-05-18T00:01:15Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Metasurfaces offer the potential to control light propagation at the nanoscale for applications in both free-space and surface-confined geometries. Existing metasurfaces frequently utilize metallic polaritonic elements with high absorption losses, and/or fixed geometrical designs that serve a single function. Here we overcome these limitations by demonstrating a reconfigurable hyperbolic metasurface comprising of a heterostructure of isotopically enriched hexagonal boron nitride (hBN) in direct contact with the phase-change material (PCM) vanadium dioxide (VO2). Spatially localized metallic an","authors_text":"Alireza Fali, James H. Edgar, Joseph R. Matson, Joshua D. Caldwell, Neda A. Aghamiri, Richard F. Haglund, Samuel T. White, Song Liu, Thomas G. Folland, Yohannes Abate","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"physics.optics","submitted_at":"2018-05-21T21:20:18Z","title":"Reconfigurable Mid-Infrared Hyperbolic Metasurfaces using Phase-Change Materials"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.08292","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:7a6f640a592d02ca6801d129814c2c96f2d3c0efa2b2964f858fb13d098be97e","target":"record","created_at":"2026-05-18T00:01:15Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"44cc4e5cf09b89fc012b4ef78b5ff6670489f1b0fbf75c779f1ad8a6336b601e","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"physics.optics","submitted_at":"2018-05-21T21:20:18Z","title_canon_sha256":"1fdc11e8ff542c6fbb5bb1767f439a096c51eded4623cc293586466f4f377f0a"},"schema_version":"1.0","source":{"id":"1805.08292","kind":"arxiv","version":1}},"canonical_sha256":"8f16d0a737793fce390e624d2ff4fa1c06bb76063751f8fa6920c918bdbf7f64","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8f16d0a737793fce390e624d2ff4fa1c06bb76063751f8fa6920c918bdbf7f64","first_computed_at":"2026-05-18T00:01:15.006224Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:01:15.006224Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rnfvqLP/lYgomEmquC5FNcgnq4VoUf6ejH0OOLwisYlxhScFsCQDLWDEbpIHKjeOS93xABAcWRojx7YZ1zsvDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:01:15.006650Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.08292","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7a6f640a592d02ca6801d129814c2c96f2d3c0efa2b2964f858fb13d098be97e","sha256:8e049ee1b3dd744f2d3e757ff7b35086b7d8c19683b3507ffb11811f82e669b9"],"state_sha256":"189b864091a06c92314e390803aae64700ad09dda2bac40598403b707ed4a46c"}