{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:BGBI7BONSXNFCKY5UC4X6QX3SN","short_pith_number":"pith:BGBI7BON","canonical_record":{"source":{"id":"1209.5777","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-09-25T21:29:05Z","cross_cats_sorted":[],"title_canon_sha256":"b31ba98f16f4c6572c4faf4d66ecb93ecbcb632c3906ae6f0221c53191b06895","abstract_canon_sha256":"9425991b6c11c4f77626fa0a3a48eee2a9607f8f2a0e06142493171066f26f30"},"schema_version":"1.0"},"canonical_sha256":"09828f85cd95da512b1da0b97f42fb935af20b31814d4ef72b55305975f0e3ec","source":{"kind":"arxiv","id":"1209.5777","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.5777","created_at":"2026-05-18T03:44:46Z"},{"alias_kind":"arxiv_version","alias_value":"1209.5777v1","created_at":"2026-05-18T03:44:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.5777","created_at":"2026-05-18T03:44:46Z"},{"alias_kind":"pith_short_12","alias_value":"BGBI7BONSXNF","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"BGBI7BONSXNFCKY5","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"BGBI7BON","created_at":"2026-05-18T12:26:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:BGBI7BONSXNFCKY5UC4X6QX3SN","target":"record","payload":{"canonical_record":{"source":{"id":"1209.5777","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-09-25T21:29:05Z","cross_cats_sorted":[],"title_canon_sha256":"b31ba98f16f4c6572c4faf4d66ecb93ecbcb632c3906ae6f0221c53191b06895","abstract_canon_sha256":"9425991b6c11c4f77626fa0a3a48eee2a9607f8f2a0e06142493171066f26f30"},"schema_version":"1.0"},"canonical_sha256":"09828f85cd95da512b1da0b97f42fb935af20b31814d4ef72b55305975f0e3ec","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:44:46.460054Z","signature_b64":"C097SmbEH+TpB1BA+1YsKDdkjB/ZSo8VrsE3yi32nyICP7Ct034/vK4WAj/zkXAQSO8Qseh8DMwzTsx5hEzKBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"09828f85cd95da512b1da0b97f42fb935af20b31814d4ef72b55305975f0e3ec","last_reissued_at":"2026-05-18T03:44:46.459456Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:44:46.459456Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1209.5777","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:44:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yBcgR3CwSVr0Ai3id40RTnoMuy5/PBYmYMJJ4fkACydvYkRUe/NkaZr4VlGdCyNJSstqoWmdTg39Odyw6TctAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T05:04:01.482791Z"},"content_sha256":"341d285de82dc4810474358123911b3a0661f8416857fcb475247d16a01260b7","schema_version":"1.0","event_id":"sha256:341d285de82dc4810474358123911b3a0661f8416857fcb475247d16a01260b7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:BGBI7BONSXNFCKY5UC4X6QX3SN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical metamaterials with different metals","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Costas M. Soukoulis, Maria Kafesaki, Nian-Hai Shen, Thomas Koschny","submitted_at":"2012-09-25T21:29:05Z","abstract_excerpt":"We investigate the influence of different metals on the electromagnetic response of fishnet metamaterials in the optical regime.We found, instead of using a Drude model, metals with a dielectric function from experimentally measured data should be applied to correctly predict the behavior of optical metamaterials. Through comparison of the performance for fishnet metamaterials made with different metals (i.e., gold, copper, and silver), we found silver is the best choice for the metallic parts compared to other metals, because silver allows for the strongest negative-permeability resonance and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.5777","kind":"arxiv","version":1},"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":"2026-05-18T03:44:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5UCbNSqkeL4sr325S+0aOlZt3VA4RAiYCDMwINP+np5OUuU9qDeJFO60Gstsuh+6Tj/DdjuTWWkRNJZNEiMNBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T05:04:01.483387Z"},"content_sha256":"2dec11e6dd18e1c0d49cba3ef2f1307c8e1c9fe41f1d52bc38e649ce232c5306","schema_version":"1.0","event_id":"sha256:2dec11e6dd18e1c0d49cba3ef2f1307c8e1c9fe41f1d52bc38e649ce232c5306"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BGBI7BONSXNFCKY5UC4X6QX3SN/bundle.json","state_url":"https://pith.science/pith/BGBI7BONSXNFCKY5UC4X6QX3SN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BGBI7BONSXNFCKY5UC4X6QX3SN/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":"2026-06-05T05:04:01Z","links":{"resolver":"https://pith.science/pith/BGBI7BONSXNFCKY5UC4X6QX3SN","bundle":"https://pith.science/pith/BGBI7BONSXNFCKY5UC4X6QX3SN/bundle.json","state":"https://pith.science/pith/BGBI7BONSXNFCKY5UC4X6QX3SN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BGBI7BONSXNFCKY5UC4X6QX3SN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:BGBI7BONSXNFCKY5UC4X6QX3SN","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":"9425991b6c11c4f77626fa0a3a48eee2a9607f8f2a0e06142493171066f26f30","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-09-25T21:29:05Z","title_canon_sha256":"b31ba98f16f4c6572c4faf4d66ecb93ecbcb632c3906ae6f0221c53191b06895"},"schema_version":"1.0","source":{"id":"1209.5777","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.5777","created_at":"2026-05-18T03:44:46Z"},{"alias_kind":"arxiv_version","alias_value":"1209.5777v1","created_at":"2026-05-18T03:44:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.5777","created_at":"2026-05-18T03:44:46Z"},{"alias_kind":"pith_short_12","alias_value":"BGBI7BONSXNF","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"BGBI7BONSXNFCKY5","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"BGBI7BON","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:2dec11e6dd18e1c0d49cba3ef2f1307c8e1c9fe41f1d52bc38e649ce232c5306","target":"graph","created_at":"2026-05-18T03:44:46Z","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 investigate the influence of different metals on the electromagnetic response of fishnet metamaterials in the optical regime.We found, instead of using a Drude model, metals with a dielectric function from experimentally measured data should be applied to correctly predict the behavior of optical metamaterials. Through comparison of the performance for fishnet metamaterials made with different metals (i.e., gold, copper, and silver), we found silver is the best choice for the metallic parts compared to other metals, because silver allows for the strongest negative-permeability resonance and","authors_text":"Costas M. Soukoulis, Maria Kafesaki, Nian-Hai Shen, Thomas Koschny","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-09-25T21:29:05Z","title":"Optical metamaterials with different metals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.5777","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":"sha256:341d285de82dc4810474358123911b3a0661f8416857fcb475247d16a01260b7","target":"record","created_at":"2026-05-18T03:44:46Z","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":"9425991b6c11c4f77626fa0a3a48eee2a9607f8f2a0e06142493171066f26f30","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-09-25T21:29:05Z","title_canon_sha256":"b31ba98f16f4c6572c4faf4d66ecb93ecbcb632c3906ae6f0221c53191b06895"},"schema_version":"1.0","source":{"id":"1209.5777","kind":"arxiv","version":1}},"canonical_sha256":"09828f85cd95da512b1da0b97f42fb935af20b31814d4ef72b55305975f0e3ec","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"09828f85cd95da512b1da0b97f42fb935af20b31814d4ef72b55305975f0e3ec","first_computed_at":"2026-05-18T03:44:46.459456Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:44:46.459456Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C097SmbEH+TpB1BA+1YsKDdkjB/ZSo8VrsE3yi32nyICP7Ct034/vK4WAj/zkXAQSO8Qseh8DMwzTsx5hEzKBg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:44:46.460054Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.5777","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:341d285de82dc4810474358123911b3a0661f8416857fcb475247d16a01260b7","sha256:2dec11e6dd18e1c0d49cba3ef2f1307c8e1c9fe41f1d52bc38e649ce232c5306"],"state_sha256":"574a10053e473b4862a5d77590995848834bd7cc6fd6f96c6818c145423a6bd1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FR27EKRsgpHTGdAvow9EKSCQH2kXNKbrFwrKEMYeDekOoAPF8T/Z/kNloR62Iuop8e2dR4qZ0p0ojt5nDOU6Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T05:04:01.487324Z","bundle_sha256":"ab03d1da74356ff48322df42c3c1400f139e35454eb10070572328ca0a1a4a15"}}