{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:BBJEL77CWERY6R2HYUBD25KDW6","short_pith_number":"pith:BBJEL77C","canonical_record":{"source":{"id":"1804.08827","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-04-24T03:13:30Z","cross_cats_sorted":[],"title_canon_sha256":"9ddf586f430b0b175c7d5d2d6a4c6112f65bc7610d5876250a994a7ab356f936","abstract_canon_sha256":"b2d2ccdd4f3c04e13189dbac3fc35dcd6ed07c29c819b4e71821a808c099d79f"},"schema_version":"1.0"},"canonical_sha256":"085245ffe2b1238f4747c5023d7543b7b7e8e311c78ac0096f8595c23c1b84e2","source":{"kind":"arxiv","id":"1804.08827","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.08827","created_at":"2026-05-17T23:49:43Z"},{"alias_kind":"arxiv_version","alias_value":"1804.08827v1","created_at":"2026-05-17T23:49:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.08827","created_at":"2026-05-17T23:49:43Z"},{"alias_kind":"pith_short_12","alias_value":"BBJEL77CWERY","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"BBJEL77CWERY6R2H","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"BBJEL77C","created_at":"2026-05-18T12:32:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:BBJEL77CWERY6R2HYUBD25KDW6","target":"record","payload":{"canonical_record":{"source":{"id":"1804.08827","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-04-24T03:13:30Z","cross_cats_sorted":[],"title_canon_sha256":"9ddf586f430b0b175c7d5d2d6a4c6112f65bc7610d5876250a994a7ab356f936","abstract_canon_sha256":"b2d2ccdd4f3c04e13189dbac3fc35dcd6ed07c29c819b4e71821a808c099d79f"},"schema_version":"1.0"},"canonical_sha256":"085245ffe2b1238f4747c5023d7543b7b7e8e311c78ac0096f8595c23c1b84e2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:49:43.892587Z","signature_b64":"N5HgySGFtnOSmLqwfgW3CWdIHu6+f+bVqxas7S62RXPUZZ/6zyvrR8VsLCfyCW2yZuqUWWrDu3AoZVb95H1PBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"085245ffe2b1238f4747c5023d7543b7b7e8e311c78ac0096f8595c23c1b84e2","last_reissued_at":"2026-05-17T23:49:43.892127Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:49:43.892127Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.08827","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":"2026-05-17T23:49:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pnar+XIxbbLs8IoNHRDH8EqXqyXPtpH1b6ybCKw13A8kxWjYJ3/eoERXv9KaeEFBFiG0s7rINHKdEqs7X6mPDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T12:36:18.398738Z"},"content_sha256":"66f5e10366135f8fc6ca2ba226ecbb292eb0aded13c2bae7862b3c33956c6392","schema_version":"1.0","event_id":"sha256:66f5e10366135f8fc6ca2ba226ecbb292eb0aded13c2bae7862b3c33956c6392"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:BBJEL77CWERY6R2HYUBD25KDW6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Broadband Superabsorber at Optical Frequencies: Design and Demonstration","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Arvind Nagarajan, Giampiero Gerini, Kumar Vivek, Manav Shah, Venu Gopal Achanta","submitted_at":"2018-04-24T03:13:30Z","abstract_excerpt":"Metasurface based super absorbers exhibit near unity absorbance. While the absorption peak can be tuned by the geometry/size of the sub-wavelength resonator, broadband absorption can be obtained by placing multiple resonators of various size or shapes in a unit cell. Metal dispersion hinders high performance broadband absorption at optical frequencies and careful designing is essential to achieve good structures. We propose a novel analytical framework for designing a broadband super absorber which is much faster than the time consuming full wave simulations that are employed so far. Analytica"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.08827","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":"2026-05-17T23:49:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jjgHpQYt+ttaF46AXjt6V+A8itoWdOSuiXjFDIuI0lDg8NCRwXAEODFFpe0niBOcjarN60mcWKb1HUVBS+MeCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T12:36:18.399094Z"},"content_sha256":"6b3f90ac660a3c7d47a160045ac9ab4bcf703af872a3d2cd33e068d0fb471e45","schema_version":"1.0","event_id":"sha256:6b3f90ac660a3c7d47a160045ac9ab4bcf703af872a3d2cd33e068d0fb471e45"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BBJEL77CWERY6R2HYUBD25KDW6/bundle.json","state_url":"https://pith.science/pith/BBJEL77CWERY6R2HYUBD25KDW6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BBJEL77CWERY6R2HYUBD25KDW6/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":"2026-06-03T12:36:18Z","links":{"resolver":"https://pith.science/pith/BBJEL77CWERY6R2HYUBD25KDW6","bundle":"https://pith.science/pith/BBJEL77CWERY6R2HYUBD25KDW6/bundle.json","state":"https://pith.science/pith/BBJEL77CWERY6R2HYUBD25KDW6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BBJEL77CWERY6R2HYUBD25KDW6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:BBJEL77CWERY6R2HYUBD25KDW6","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":"b2d2ccdd4f3c04e13189dbac3fc35dcd6ed07c29c819b4e71821a808c099d79f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-04-24T03:13:30Z","title_canon_sha256":"9ddf586f430b0b175c7d5d2d6a4c6112f65bc7610d5876250a994a7ab356f936"},"schema_version":"1.0","source":{"id":"1804.08827","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.08827","created_at":"2026-05-17T23:49:43Z"},{"alias_kind":"arxiv_version","alias_value":"1804.08827v1","created_at":"2026-05-17T23:49:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.08827","created_at":"2026-05-17T23:49:43Z"},{"alias_kind":"pith_short_12","alias_value":"BBJEL77CWERY","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"BBJEL77CWERY6R2H","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"BBJEL77C","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:6b3f90ac660a3c7d47a160045ac9ab4bcf703af872a3d2cd33e068d0fb471e45","target":"graph","created_at":"2026-05-17T23:49:43Z","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":"Metasurface based super absorbers exhibit near unity absorbance. While the absorption peak can be tuned by the geometry/size of the sub-wavelength resonator, broadband absorption can be obtained by placing multiple resonators of various size or shapes in a unit cell. Metal dispersion hinders high performance broadband absorption at optical frequencies and careful designing is essential to achieve good structures. We propose a novel analytical framework for designing a broadband super absorber which is much faster than the time consuming full wave simulations that are employed so far. Analytica","authors_text":"Arvind Nagarajan, Giampiero Gerini, Kumar Vivek, Manav Shah, Venu Gopal Achanta","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-04-24T03:13:30Z","title":"A Broadband Superabsorber at Optical Frequencies: Design and Demonstration"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.08827","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":"sha256:66f5e10366135f8fc6ca2ba226ecbb292eb0aded13c2bae7862b3c33956c6392","target":"record","created_at":"2026-05-17T23:49:43Z","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":"b2d2ccdd4f3c04e13189dbac3fc35dcd6ed07c29c819b4e71821a808c099d79f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-04-24T03:13:30Z","title_canon_sha256":"9ddf586f430b0b175c7d5d2d6a4c6112f65bc7610d5876250a994a7ab356f936"},"schema_version":"1.0","source":{"id":"1804.08827","kind":"arxiv","version":1}},"canonical_sha256":"085245ffe2b1238f4747c5023d7543b7b7e8e311c78ac0096f8595c23c1b84e2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"085245ffe2b1238f4747c5023d7543b7b7e8e311c78ac0096f8595c23c1b84e2","first_computed_at":"2026-05-17T23:49:43.892127Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:43.892127Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"N5HgySGFtnOSmLqwfgW3CWdIHu6+f+bVqxas7S62RXPUZZ/6zyvrR8VsLCfyCW2yZuqUWWrDu3AoZVb95H1PBA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:43.892587Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.08827","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:66f5e10366135f8fc6ca2ba226ecbb292eb0aded13c2bae7862b3c33956c6392","sha256:6b3f90ac660a3c7d47a160045ac9ab4bcf703af872a3d2cd33e068d0fb471e45"],"state_sha256":"92c5715bf71474eeedeecc58b53cb3f941c8e00ab3a20e02d3efd83aa8a12337"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GWaCdQX6IwcalhXmkjg0eVBMwpLq/EWqV2gt2kxR0lcGLmjGBg1gvghrxcUQ9ThIOxQUI56/oFkk2ZX277eZAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T12:36:18.401334Z","bundle_sha256":"237a635cfd429ddcfdf7d115698c7ccc813990e3d7404efbbff1aabb0bfc4fd3"}}