{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:T7P6BFLLUHZNTH4NJ3CQGCQKTX","short_pith_number":"pith:T7P6BFLL","canonical_record":{"source":{"id":"1002.1974","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2010-02-10T20:28:24Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"26898e855075d8a6409b0d3c6f4a7fc6d471db5f91bd5a60e21b93db5b8ab91b","abstract_canon_sha256":"82181399bc3500c4608c7d10cf1c6dcb4bc03a3be6a4d2e69c40ead09285662c"},"schema_version":"1.0"},"canonical_sha256":"9fdfe0956ba1f2d99f8d4ec5030a0a9dc8ffd582129b37d865402be985fbb96e","source":{"kind":"arxiv","id":"1002.1974","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.1974","created_at":"2026-05-18T02:09:10Z"},{"alias_kind":"arxiv_version","alias_value":"1002.1974v2","created_at":"2026-05-18T02:09:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.1974","created_at":"2026-05-18T02:09:10Z"},{"alias_kind":"pith_short_12","alias_value":"T7P6BFLLUHZN","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"T7P6BFLLUHZNTH4N","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"T7P6BFLL","created_at":"2026-05-18T12:26:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:T7P6BFLLUHZNTH4NJ3CQGCQKTX","target":"record","payload":{"canonical_record":{"source":{"id":"1002.1974","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2010-02-10T20:28:24Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"26898e855075d8a6409b0d3c6f4a7fc6d471db5f91bd5a60e21b93db5b8ab91b","abstract_canon_sha256":"82181399bc3500c4608c7d10cf1c6dcb4bc03a3be6a4d2e69c40ead09285662c"},"schema_version":"1.0"},"canonical_sha256":"9fdfe0956ba1f2d99f8d4ec5030a0a9dc8ffd582129b37d865402be985fbb96e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:09:10.560504Z","signature_b64":"8SWKTVQYZZUh58XHXppI0TTiyriOBtjxCkbWKsQHLEsrYzjepA3l8xEh5y3fqL45URgwepvB2JmYGTaUETZCDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9fdfe0956ba1f2d99f8d4ec5030a0a9dc8ffd582129b37d865402be985fbb96e","last_reissued_at":"2026-05-18T02:09:10.559676Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:09:10.559676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1002.1974","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:09:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HrwnIt7Qn8do8nfOFqHC7z5Fe9WU0YuxUbmOADmYQ0VhTCAcCoN8EhPu6A079pMM+uhniKE1wFEE9KyC9LrjCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T08:44:48.829340Z"},"content_sha256":"532566d7218766063ea6d43f9241c7e241011a2cd1be3928cce1e6c2d02e8cb1","schema_version":"1.0","event_id":"sha256:532566d7218766063ea6d43f9241c7e241011a2cd1be3928cce1e6c2d02e8cb1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:T7P6BFLLUHZNTH4NJ3CQGCQKTX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An Infrared Spatial and Frequency Selective Metamaterial Perfect Absorber","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Anthony Starr, Tatiana Starr, Willie J. Padilla, Xianliang Liu","submitted_at":"2010-02-10T20:28:24Z","abstract_excerpt":"We demonstrate, for the first time, a spatially dependent metamaterial perfect absorber operating in the infrared regime. We achieve an experimental absorption of 97% at a wavelength of 6.0 microns, and our results agree well with numerical full-wave simulations. By using two different metamaterial sublattices we experimentally demonstrate a spatial and frequency varying absorption which may have many relevant applications including hyperspectral sub-sampling imaging"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.1974","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":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:09:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vQ2tsVLBcqGNd74VK1okqqPhdQgVPKwZBtp31xwLwhoj32WgVpmkmTyii10oTPB0tQvyjip1UM7owTSU/lNiAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T08:44:48.829698Z"},"content_sha256":"15db4a6a4b22111089a3da990b54a9dfe23f2a0aab591b15f51c6722330ac25e","schema_version":"1.0","event_id":"sha256:15db4a6a4b22111089a3da990b54a9dfe23f2a0aab591b15f51c6722330ac25e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T7P6BFLLUHZNTH4NJ3CQGCQKTX/bundle.json","state_url":"https://pith.science/pith/T7P6BFLLUHZNTH4NJ3CQGCQKTX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T7P6BFLLUHZNTH4NJ3CQGCQKTX/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-25T08:44:48Z","links":{"resolver":"https://pith.science/pith/T7P6BFLLUHZNTH4NJ3CQGCQKTX","bundle":"https://pith.science/pith/T7P6BFLLUHZNTH4NJ3CQGCQKTX/bundle.json","state":"https://pith.science/pith/T7P6BFLLUHZNTH4NJ3CQGCQKTX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T7P6BFLLUHZNTH4NJ3CQGCQKTX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:T7P6BFLLUHZNTH4NJ3CQGCQKTX","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":"82181399bc3500c4608c7d10cf1c6dcb4bc03a3be6a4d2e69c40ead09285662c","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2010-02-10T20:28:24Z","title_canon_sha256":"26898e855075d8a6409b0d3c6f4a7fc6d471db5f91bd5a60e21b93db5b8ab91b"},"schema_version":"1.0","source":{"id":"1002.1974","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.1974","created_at":"2026-05-18T02:09:10Z"},{"alias_kind":"arxiv_version","alias_value":"1002.1974v2","created_at":"2026-05-18T02:09:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.1974","created_at":"2026-05-18T02:09:10Z"},{"alias_kind":"pith_short_12","alias_value":"T7P6BFLLUHZN","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"T7P6BFLLUHZNTH4N","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"T7P6BFLL","created_at":"2026-05-18T12:26:13Z"}],"graph_snapshots":[{"event_id":"sha256:15db4a6a4b22111089a3da990b54a9dfe23f2a0aab591b15f51c6722330ac25e","target":"graph","created_at":"2026-05-18T02:09:10Z","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":"We demonstrate, for the first time, a spatially dependent metamaterial perfect absorber operating in the infrared regime. We achieve an experimental absorption of 97% at a wavelength of 6.0 microns, and our results agree well with numerical full-wave simulations. By using two different metamaterial sublattices we experimentally demonstrate a spatial and frequency varying absorption which may have many relevant applications including hyperspectral sub-sampling imaging","authors_text":"Anthony Starr, Tatiana Starr, Willie J. Padilla, Xianliang Liu","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2010-02-10T20:28:24Z","title":"An Infrared Spatial and Frequency Selective Metamaterial Perfect Absorber"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.1974","kind":"arxiv","version":2},"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":"sha256:532566d7218766063ea6d43f9241c7e241011a2cd1be3928cce1e6c2d02e8cb1","target":"record","created_at":"2026-05-18T02:09:10Z","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":"82181399bc3500c4608c7d10cf1c6dcb4bc03a3be6a4d2e69c40ead09285662c","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2010-02-10T20:28:24Z","title_canon_sha256":"26898e855075d8a6409b0d3c6f4a7fc6d471db5f91bd5a60e21b93db5b8ab91b"},"schema_version":"1.0","source":{"id":"1002.1974","kind":"arxiv","version":2}},"canonical_sha256":"9fdfe0956ba1f2d99f8d4ec5030a0a9dc8ffd582129b37d865402be985fbb96e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9fdfe0956ba1f2d99f8d4ec5030a0a9dc8ffd582129b37d865402be985fbb96e","first_computed_at":"2026-05-18T02:09:10.559676Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:09:10.559676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8SWKTVQYZZUh58XHXppI0TTiyriOBtjxCkbWKsQHLEsrYzjepA3l8xEh5y3fqL45URgwepvB2JmYGTaUETZCDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:09:10.560504Z","signed_message":"canonical_sha256_bytes"},"source_id":"1002.1974","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:532566d7218766063ea6d43f9241c7e241011a2cd1be3928cce1e6c2d02e8cb1","sha256:15db4a6a4b22111089a3da990b54a9dfe23f2a0aab591b15f51c6722330ac25e"],"state_sha256":"09a5b3c8b3762c9ea2462b2e921970e0f82603e41774f0ae3b85bb552dd04a83"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"udYFdDlAAcA6t/4G39C1LbexgNOyrIERzJQvtWWkVeM4sKASAD6L6npnIah+stPt+OpklSaYkSxKnfuRxXpsDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T08:44:48.834618Z","bundle_sha256":"fa38af7744b49d242f52eb5e01c8a6439c777cb88441b534b56f08b996aadad2"}}