{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:4TSKRWTPRE3A6NPLL5SKCWLEZ2","short_pith_number":"pith:4TSKRWTP","canonical_record":{"source":{"id":"1810.10467","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-10-24T16:03:30Z","cross_cats_sorted":[],"title_canon_sha256":"fdca5bf0a16f1d12aacd3c56e85ad25a5919e90228da44779fdcc33a284c8c3f","abstract_canon_sha256":"df83d68a9187370ba28877854d40f964c1c3741da927a1d4de1a17c9459c7b65"},"schema_version":"1.0"},"canonical_sha256":"e4e4a8da6f89360f35eb5f64a15964ce991c1f4cb9e1bb79f78a7b4059b38abd","source":{"kind":"arxiv","id":"1810.10467","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.10467","created_at":"2026-05-18T00:02:23Z"},{"alias_kind":"arxiv_version","alias_value":"1810.10467v1","created_at":"2026-05-18T00:02:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.10467","created_at":"2026-05-18T00:02:23Z"},{"alias_kind":"pith_short_12","alias_value":"4TSKRWTPRE3A","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4TSKRWTPRE3A6NPL","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4TSKRWTP","created_at":"2026-05-18T12:32:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:4TSKRWTPRE3A6NPLL5SKCWLEZ2","target":"record","payload":{"canonical_record":{"source":{"id":"1810.10467","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-10-24T16:03:30Z","cross_cats_sorted":[],"title_canon_sha256":"fdca5bf0a16f1d12aacd3c56e85ad25a5919e90228da44779fdcc33a284c8c3f","abstract_canon_sha256":"df83d68a9187370ba28877854d40f964c1c3741da927a1d4de1a17c9459c7b65"},"schema_version":"1.0"},"canonical_sha256":"e4e4a8da6f89360f35eb5f64a15964ce991c1f4cb9e1bb79f78a7b4059b38abd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:02:23.017521Z","signature_b64":"VzgO/eGdP7rv8bB0we5AUE1C/o7MICYHWdXno5/j8QLlg8ykvXHg/cegI+Dbs3IDfqDlrn0qlV/P3PeCFChYCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e4e4a8da6f89360f35eb5f64a15964ce991c1f4cb9e1bb79f78a7b4059b38abd","last_reissued_at":"2026-05-18T00:02:23.016924Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:02:23.016924Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1810.10467","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":"2026-05-18T00:02:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WsegLm+SUaTI7FXhsK5lSZFGQV7YmYVSOf53DvvWNJWEjadbb6IIlgQP/i3bVWCQ8JaL85F+7G1Oyfar21/KCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:40:49.735768Z"},"content_sha256":"12db91ae5029937d8fab5c68813c66093b818a27ad437d11eb75aa9453e31a0d","schema_version":"1.0","event_id":"sha256:12db91ae5029937d8fab5c68813c66093b818a27ad437d11eb75aa9453e31a0d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:4TSKRWTPRE3A6NPLL5SKCWLEZ2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Broadband Tunable THz Absorption with Singular Graphene Metasurfaces","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Emanuele Galiffi, John Pendry, Paloma Arroyo Huidobro","submitted_at":"2018-10-24T16:03:30Z","abstract_excerpt":"By exploiting singular spatial modulations of the graphene conductivity, we design a broadband, tunable THz absorber whose efficiency approaches the theoretical upper bound for a wide absorption band with a fractional bandwidth of 185\\%. Strong field enhancement is exhibited by the modes of this extended structure, which is able to excite a wealth of high order surface plasmons, enabling deeply subwavelength focussing of incident THz radiation. Previous studies have shown that the conductivity can be modulated at GHz frequencies, which might lead to the development of efficient high speed broa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.10467","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":"2026-05-18T00:02:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fQCQTnCgf8kKc8RdrhHCVCGh90ZzuQ2uU8kf4+izEBKXJukQOXr9CJ7FmvH+7018WoTYxziw13dMdBldTpsqBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:40:49.736156Z"},"content_sha256":"bc471760f5a84a8b0cb24e26bdd07137b44e8fd03f7824b3d1461ed5f95d26d2","schema_version":"1.0","event_id":"sha256:bc471760f5a84a8b0cb24e26bdd07137b44e8fd03f7824b3d1461ed5f95d26d2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4TSKRWTPRE3A6NPLL5SKCWLEZ2/bundle.json","state_url":"https://pith.science/pith/4TSKRWTPRE3A6NPLL5SKCWLEZ2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4TSKRWTPRE3A6NPLL5SKCWLEZ2/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":"2026-05-25T13:40:49Z","links":{"resolver":"https://pith.science/pith/4TSKRWTPRE3A6NPLL5SKCWLEZ2","bundle":"https://pith.science/pith/4TSKRWTPRE3A6NPLL5SKCWLEZ2/bundle.json","state":"https://pith.science/pith/4TSKRWTPRE3A6NPLL5SKCWLEZ2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4TSKRWTPRE3A6NPLL5SKCWLEZ2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4TSKRWTPRE3A6NPLL5SKCWLEZ2","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":"df83d68a9187370ba28877854d40f964c1c3741da927a1d4de1a17c9459c7b65","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-10-24T16:03:30Z","title_canon_sha256":"fdca5bf0a16f1d12aacd3c56e85ad25a5919e90228da44779fdcc33a284c8c3f"},"schema_version":"1.0","source":{"id":"1810.10467","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.10467","created_at":"2026-05-18T00:02:23Z"},{"alias_kind":"arxiv_version","alias_value":"1810.10467v1","created_at":"2026-05-18T00:02:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.10467","created_at":"2026-05-18T00:02:23Z"},{"alias_kind":"pith_short_12","alias_value":"4TSKRWTPRE3A","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4TSKRWTPRE3A6NPL","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4TSKRWTP","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:bc471760f5a84a8b0cb24e26bdd07137b44e8fd03f7824b3d1461ed5f95d26d2","target":"graph","created_at":"2026-05-18T00:02:23Z","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":"By exploiting singular spatial modulations of the graphene conductivity, we design a broadband, tunable THz absorber whose efficiency approaches the theoretical upper bound for a wide absorption band with a fractional bandwidth of 185\\%. Strong field enhancement is exhibited by the modes of this extended structure, which is able to excite a wealth of high order surface plasmons, enabling deeply subwavelength focussing of incident THz radiation. Previous studies have shown that the conductivity can be modulated at GHz frequencies, which might lead to the development of efficient high speed broa","authors_text":"Emanuele Galiffi, John Pendry, Paloma Arroyo Huidobro","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-10-24T16:03:30Z","title":"Broadband Tunable THz Absorption with Singular Graphene Metasurfaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.10467","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":"sha256:12db91ae5029937d8fab5c68813c66093b818a27ad437d11eb75aa9453e31a0d","target":"record","created_at":"2026-05-18T00:02:23Z","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":"df83d68a9187370ba28877854d40f964c1c3741da927a1d4de1a17c9459c7b65","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-10-24T16:03:30Z","title_canon_sha256":"fdca5bf0a16f1d12aacd3c56e85ad25a5919e90228da44779fdcc33a284c8c3f"},"schema_version":"1.0","source":{"id":"1810.10467","kind":"arxiv","version":1}},"canonical_sha256":"e4e4a8da6f89360f35eb5f64a15964ce991c1f4cb9e1bb79f78a7b4059b38abd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e4e4a8da6f89360f35eb5f64a15964ce991c1f4cb9e1bb79f78a7b4059b38abd","first_computed_at":"2026-05-18T00:02:23.016924Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:02:23.016924Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VzgO/eGdP7rv8bB0we5AUE1C/o7MICYHWdXno5/j8QLlg8ykvXHg/cegI+Dbs3IDfqDlrn0qlV/P3PeCFChYCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:02:23.017521Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.10467","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:12db91ae5029937d8fab5c68813c66093b818a27ad437d11eb75aa9453e31a0d","sha256:bc471760f5a84a8b0cb24e26bdd07137b44e8fd03f7824b3d1461ed5f95d26d2"],"state_sha256":"8a79db3869fde8948fb17a86e908df375cb77e6c61939d75b1cddfa0d9715c93"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rToZO3V1K90ABq+L0zWV4XqO7xTzae1g+cRGQM3g/bTtqr+RwCX/PznrVJCA/oJXZ/oNBevmL519gSaC8AyxCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T13:40:49.738544Z","bundle_sha256":"f0585865feb057e1a55a004d1d70c1ea9736012196d7285a4ba71825553ea6ec"}}