{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:7DHHPI64DY2T2X23H22GTT3OJB","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":"d6877ce2e87afa47085229137859a8be7714a38697394f6238a8cbe99c663ea7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-03-31T04:21:34Z","title_canon_sha256":"7095b7504ba3af34884ed1f7d583f96403f98f2ca23eef7506f2fd990c6da74e"},"schema_version":"1.0","source":{"id":"1703.10753","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.10753","created_at":"2026-05-18T00:47:32Z"},{"alias_kind":"arxiv_version","alias_value":"1703.10753v1","created_at":"2026-05-18T00:47:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.10753","created_at":"2026-05-18T00:47:32Z"},{"alias_kind":"pith_short_12","alias_value":"7DHHPI64DY2T","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"7DHHPI64DY2T2X23","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"7DHHPI64","created_at":"2026-05-18T12:31:03Z"}],"graph_snapshots":[{"event_id":"sha256:ac7df6dc24df6c21d1e2501990e41ed9791888589f3f1d857b7cc3820924f87a","target":"graph","created_at":"2026-05-18T00:47:32Z","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":"Chalcogenide glasses are exceptional materials that show a wide contrast in optical properties upon phase change and are highly researched for reconfigurable electronic and nanophotonic devices. Here, we report the first proof-of-concept demonstration of a non-volatile, switchable hyperbolic metamaterial based on a chalcogenide glass. By using the $Ge_{2}Sb_{2}Te_{5}$ (GST) alloy as one of the components of a multilayered nanocomposite structure and exploiting its phase change property, we demonstrate a hyperbolic metamaterial in which the Type-I hyperbolic dispersion $({\\epsilon}_{\\perp} < 0,","authors_text":"Behrad Gholipour, Cesare Soci, Harish N. S. Krishnamoorthy, Nikolay I. Zheludev","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-03-31T04:21:34Z","title":"Chalcogenide hyperbolic metamaterial with switchable negative refraction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.10753","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":"sha256:7c88b0afa084179d390ec9d1e42d1a3bdefbb2bbcc50c4ea4a2730fc553a4c42","target":"record","created_at":"2026-05-18T00:47:32Z","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":"d6877ce2e87afa47085229137859a8be7714a38697394f6238a8cbe99c663ea7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2017-03-31T04:21:34Z","title_canon_sha256":"7095b7504ba3af34884ed1f7d583f96403f98f2ca23eef7506f2fd990c6da74e"},"schema_version":"1.0","source":{"id":"1703.10753","kind":"arxiv","version":1}},"canonical_sha256":"f8ce77a3dc1e353d5f5b3eb469cf6e486737ccaf7fb2ea129bc3deacc15fddf7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f8ce77a3dc1e353d5f5b3eb469cf6e486737ccaf7fb2ea129bc3deacc15fddf7","first_computed_at":"2026-05-18T00:47:32.773300Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:47:32.773300Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Os+sVVpJPsvnYb+1/+YZyUrUhZfvY6MZqChrRsJoQgKATYRfjTwGIH49Sp4FdT/gpkuGfGduAwiJDXm5tU3hDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:47:32.773734Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.10753","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7c88b0afa084179d390ec9d1e42d1a3bdefbb2bbcc50c4ea4a2730fc553a4c42","sha256:ac7df6dc24df6c21d1e2501990e41ed9791888589f3f1d857b7cc3820924f87a"],"state_sha256":"4d421bb8e07f149ad4f39dde79b99443903571f3f6817e84de095827f4514e48"}