{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:CPCMFAXFD2JIQG72XJTLIV4SOS","short_pith_number":"pith:CPCMFAXF","canonical_record":{"source":{"id":"2007.12775","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-24T21:32:04Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"d617581483d038dc6bb9ecfbc4caaa8a4c932780dd8f0ec19ca17da481a7802c","abstract_canon_sha256":"8c31e5086f440ad1dd8ba1b6968f74ad50b8e675d69541b35599f4b265607868"},"schema_version":"1.0"},"canonical_sha256":"13c4c282e51e92881bfaba66b4579274935dfdd8f69b369a089a0ca0c54ab84b","source":{"kind":"arxiv","id":"2007.12775","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.12775","created_at":"2026-07-05T01:22:20Z"},{"alias_kind":"arxiv_version","alias_value":"2007.12775v1","created_at":"2026-07-05T01:22:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.12775","created_at":"2026-07-05T01:22:20Z"},{"alias_kind":"pith_short_12","alias_value":"CPCMFAXFD2JI","created_at":"2026-07-05T01:22:20Z"},{"alias_kind":"pith_short_16","alias_value":"CPCMFAXFD2JIQG72","created_at":"2026-07-05T01:22:20Z"},{"alias_kind":"pith_short_8","alias_value":"CPCMFAXF","created_at":"2026-07-05T01:22:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:CPCMFAXFD2JIQG72XJTLIV4SOS","target":"record","payload":{"canonical_record":{"source":{"id":"2007.12775","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-24T21:32:04Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"d617581483d038dc6bb9ecfbc4caaa8a4c932780dd8f0ec19ca17da481a7802c","abstract_canon_sha256":"8c31e5086f440ad1dd8ba1b6968f74ad50b8e675d69541b35599f4b265607868"},"schema_version":"1.0"},"canonical_sha256":"13c4c282e51e92881bfaba66b4579274935dfdd8f69b369a089a0ca0c54ab84b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:22:20.811028Z","signature_b64":"qprkksgqhjHAtkJ79VPJFAZfM+/7+uQhTGF8pJdR7QrIyODes8LsExJ2CJ1MHS9LyUTm2ciTZva7Asr417T3BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"13c4c282e51e92881bfaba66b4579274935dfdd8f69b369a089a0ca0c54ab84b","last_reissued_at":"2026-07-05T01:22:20.810679Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:22:20.810679Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2007.12775","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":"2026-07-05T01:22:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TtIcpeaGyoqQjTR9XlyCtmYU8d0Gjjrm54d/LaRoKxP+9A16IVII5o9lt7xl9CPPdfU2U0vIbBm4eHrVs2uOBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T04:38:49.454846Z"},"content_sha256":"440d07edfddfc89ef31cd231008594bcfa63ce70c687d2d7f0eb79f1a52f2767","schema_version":"1.0","event_id":"sha256:440d07edfddfc89ef31cd231008594bcfa63ce70c687d2d7f0eb79f1a52f2767"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:CPCMFAXFD2JIQG72XJTLIV4SOS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Integration of multi-layer black phosphorus into photoconductive antennas for THz emission","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.app-ph","authors_text":"A. Fereidouni, A. F. Rawwagah, H. O. H. Churchill, J. I. Santos Batista, J. P. Thompson, K. Watanabe, M. El-Shenawee, M. H. Doha, T. Taniguchi","submitted_at":"2020-07-24T21:32:04Z","abstract_excerpt":"We report the fabrication, characterization, and modeling of photoconductive antennas using 40 nm thin-film flakes of black phosphorus (BP) as the photoconductor and hexagonal boron nitride (hBN) as a capping layer to prevent oxidation of BP. Dipole antennas were fabricated on oxidized high-resistivity Si substrates, and BP and hBN flakes were picked up and transferred onto the antenna inside a nitrogen glovebox. The transfer matrix technique was used to optimize the thickness of BP and hBN for maximum absorption. BP flakes were aligned with the armchair axis along the anode-cathode gap of the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.12775","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2007.12775/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T01:22:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ChvkMkOw2R5/+9sij6kSh7oj12Qky7A+1Vmf1s9pghlG7kzYIBubH3eTj7mMLXtflqwuu4GWGAiD9DO50aZ4Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T04:38:49.455416Z"},"content_sha256":"2918ab9e81b728e8cd431322e5f3af6b3417a4e191f73cbbde53ef79d957045e","schema_version":"1.0","event_id":"sha256:2918ab9e81b728e8cd431322e5f3af6b3417a4e191f73cbbde53ef79d957045e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CPCMFAXFD2JIQG72XJTLIV4SOS/bundle.json","state_url":"https://pith.science/pith/CPCMFAXFD2JIQG72XJTLIV4SOS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CPCMFAXFD2JIQG72XJTLIV4SOS/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":"2026-08-05T04:38:49Z","links":{"resolver":"https://pith.science/pith/CPCMFAXFD2JIQG72XJTLIV4SOS","bundle":"https://pith.science/pith/CPCMFAXFD2JIQG72XJTLIV4SOS/bundle.json","state":"https://pith.science/pith/CPCMFAXFD2JIQG72XJTLIV4SOS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CPCMFAXFD2JIQG72XJTLIV4SOS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:CPCMFAXFD2JIQG72XJTLIV4SOS","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":"8c31e5086f440ad1dd8ba1b6968f74ad50b8e675d69541b35599f4b265607868","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-24T21:32:04Z","title_canon_sha256":"d617581483d038dc6bb9ecfbc4caaa8a4c932780dd8f0ec19ca17da481a7802c"},"schema_version":"1.0","source":{"id":"2007.12775","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.12775","created_at":"2026-07-05T01:22:20Z"},{"alias_kind":"arxiv_version","alias_value":"2007.12775v1","created_at":"2026-07-05T01:22:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.12775","created_at":"2026-07-05T01:22:20Z"},{"alias_kind":"pith_short_12","alias_value":"CPCMFAXFD2JI","created_at":"2026-07-05T01:22:20Z"},{"alias_kind":"pith_short_16","alias_value":"CPCMFAXFD2JIQG72","created_at":"2026-07-05T01:22:20Z"},{"alias_kind":"pith_short_8","alias_value":"CPCMFAXF","created_at":"2026-07-05T01:22:20Z"}],"graph_snapshots":[{"event_id":"sha256:2918ab9e81b728e8cd431322e5f3af6b3417a4e191f73cbbde53ef79d957045e","target":"graph","created_at":"2026-07-05T01:22:20Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2007.12775/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report the fabrication, characterization, and modeling of photoconductive antennas using 40 nm thin-film flakes of black phosphorus (BP) as the photoconductor and hexagonal boron nitride (hBN) as a capping layer to prevent oxidation of BP. Dipole antennas were fabricated on oxidized high-resistivity Si substrates, and BP and hBN flakes were picked up and transferred onto the antenna inside a nitrogen glovebox. The transfer matrix technique was used to optimize the thickness of BP and hBN for maximum absorption. BP flakes were aligned with the armchair axis along the anode-cathode gap of the","authors_text":"A. Fereidouni, A. F. Rawwagah, H. O. H. Churchill, J. I. Santos Batista, J. P. Thompson, K. Watanabe, M. El-Shenawee, M. H. Doha, T. Taniguchi","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-24T21:32:04Z","title":"Integration of multi-layer black phosphorus into photoconductive antennas for THz emission"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.12775","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":"sha256:440d07edfddfc89ef31cd231008594bcfa63ce70c687d2d7f0eb79f1a52f2767","target":"record","created_at":"2026-07-05T01:22:20Z","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":"8c31e5086f440ad1dd8ba1b6968f74ad50b8e675d69541b35599f4b265607868","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-24T21:32:04Z","title_canon_sha256":"d617581483d038dc6bb9ecfbc4caaa8a4c932780dd8f0ec19ca17da481a7802c"},"schema_version":"1.0","source":{"id":"2007.12775","kind":"arxiv","version":1}},"canonical_sha256":"13c4c282e51e92881bfaba66b4579274935dfdd8f69b369a089a0ca0c54ab84b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"13c4c282e51e92881bfaba66b4579274935dfdd8f69b369a089a0ca0c54ab84b","first_computed_at":"2026-07-05T01:22:20.810679Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:22:20.810679Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qprkksgqhjHAtkJ79VPJFAZfM+/7+uQhTGF8pJdR7QrIyODes8LsExJ2CJ1MHS9LyUTm2ciTZva7Asr417T3BQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:22:20.811028Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.12775","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:440d07edfddfc89ef31cd231008594bcfa63ce70c687d2d7f0eb79f1a52f2767","sha256:2918ab9e81b728e8cd431322e5f3af6b3417a4e191f73cbbde53ef79d957045e"],"state_sha256":"64d1a598e906fe5eaaa49fb951e6a25e982b201610e3c37c41c3c65d583436d0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CHIjI6EJmkUBTsccYEBkyASTIOCfr7dxaHDNrBIqGwIYoLiKdbXGCGGx+S3YZCrGAEizUZ1o+Tf76UCiAMInAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T04:38:49.459970Z","bundle_sha256":"70bd5fdceea6791bbd518fe4cff3c25ec6f765a816b78bacaffd7562f9777002"}}