{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:PHDKF37PH2VFTXCQTOSTJFSNHF","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":"37f2e2665b1821e0f44d4f1bb0c1d61c73cd1c9e6694d3fb825aa3833fa9447c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-09-02T17:30:43Z","title_canon_sha256":"bf6f0ac84c5ade95a7424204889bd9de6c5b54188193d17e0af4d6ca015aabaa"},"schema_version":"1.0","source":{"id":"2009.01207","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.01207","created_at":"2026-07-05T01:32:39Z"},{"alias_kind":"arxiv_version","alias_value":"2009.01207v1","created_at":"2026-07-05T01:32:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.01207","created_at":"2026-07-05T01:32:39Z"},{"alias_kind":"pith_short_12","alias_value":"PHDKF37PH2VF","created_at":"2026-07-05T01:32:39Z"},{"alias_kind":"pith_short_16","alias_value":"PHDKF37PH2VFTXCQ","created_at":"2026-07-05T01:32:39Z"},{"alias_kind":"pith_short_8","alias_value":"PHDKF37P","created_at":"2026-07-05T01:32:39Z"}],"graph_snapshots":[{"event_id":"sha256:a8013ace6a6682bdb756c184110c04ec578b109ca880171b8be1a121ea530cc3","target":"graph","created_at":"2026-07-05T01:32:39Z","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/2009.01207/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"High-reflectance group III-nitride distributed Bragg reflectors (DBRs) were deposited by MOCVD on Si (111) substrates. A reflectance greater than 96% was demonstrated for the first time for an AlN/GaN DBR with a stop-band centered in the blue-green range of the visible spectrum. Crack-free GaN cap layers were grown on the DBR structures to demonstrate the opportunity to build III-nitride optoelectronic devices in this material. The DBR structure was under significant strain due to growth on a mismatched substrate although the GaN cap layer was shown to be strain free.","authors_text":"C.R. Eddy Jr., D.K. Gaskill, J.C. Culbertson, M.A. Mastro, M.E. Twigg, M. Fatemi, N.D. Bassim, R.L. Henry, R.T. Holm","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-09-02T17:30:43Z","title":"Metalorganic chemical-vapor deposition of high-reflectance III-nitride distributed Bragg reflectors on Si substrates"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.01207","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":"sha256:68210b317412cc41c0eadbe336a613bf79c9c1f801267fafab4264ce5c9b9211","target":"record","created_at":"2026-07-05T01:32:39Z","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":"37f2e2665b1821e0f44d4f1bb0c1d61c73cd1c9e6694d3fb825aa3833fa9447c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-09-02T17:30:43Z","title_canon_sha256":"bf6f0ac84c5ade95a7424204889bd9de6c5b54188193d17e0af4d6ca015aabaa"},"schema_version":"1.0","source":{"id":"2009.01207","kind":"arxiv","version":1}},"canonical_sha256":"79c6a2efef3eaa59dc509ba534964d39522a2dda7a57c77e6b27391c4d4a422b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"79c6a2efef3eaa59dc509ba534964d39522a2dda7a57c77e6b27391c4d4a422b","first_computed_at":"2026-07-05T01:32:39.021063Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:32:39.021063Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"r9JhBDFePiclVKWEB6NbdPiYuHHEEgG/la6/DupA+/vduxOHRvQ3q/FL5FPH9oGnHrXlHnkgbWtGqquFeHFnAw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:32:39.021558Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.01207","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:68210b317412cc41c0eadbe336a613bf79c9c1f801267fafab4264ce5c9b9211","sha256:a8013ace6a6682bdb756c184110c04ec578b109ca880171b8be1a121ea530cc3"],"state_sha256":"ad75e7c8bac33b773bc41679ef869ea0d96a6219cab22bf92d493ac00889f0fb"}