{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:UVHZYE6SGBCERFC3ZX5BY5YACV","short_pith_number":"pith:UVHZYE6S","canonical_record":{"source":{"id":"1206.0502","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-06-04T00:14:23Z","cross_cats_sorted":[],"title_canon_sha256":"904b079aecd1bbffcf5357060734fd844ab9655094372d69149975f86e36abed","abstract_canon_sha256":"a1cc3c8092e8107f863536b606e6b6821e1b0235453558be46a3543860865ad6"},"schema_version":"1.0"},"canonical_sha256":"a54f9c13d2304448945bcdfa1c7700156b3aab40b70fb2783a73134c5e9edcca","source":{"kind":"arxiv","id":"1206.0502","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.0502","created_at":"2026-05-18T03:50:08Z"},{"alias_kind":"arxiv_version","alias_value":"1206.0502v1","created_at":"2026-05-18T03:50:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.0502","created_at":"2026-05-18T03:50:08Z"},{"alias_kind":"pith_short_12","alias_value":"UVHZYE6SGBCE","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"UVHZYE6SGBCERFC3","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"UVHZYE6S","created_at":"2026-05-18T12:27:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:UVHZYE6SGBCERFC3ZX5BY5YACV","target":"record","payload":{"canonical_record":{"source":{"id":"1206.0502","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-06-04T00:14:23Z","cross_cats_sorted":[],"title_canon_sha256":"904b079aecd1bbffcf5357060734fd844ab9655094372d69149975f86e36abed","abstract_canon_sha256":"a1cc3c8092e8107f863536b606e6b6821e1b0235453558be46a3543860865ad6"},"schema_version":"1.0"},"canonical_sha256":"a54f9c13d2304448945bcdfa1c7700156b3aab40b70fb2783a73134c5e9edcca","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:50:08.911953Z","signature_b64":"9MCHI1OpArRWq/pJfHUnOFiHzDmtGSYtYKEdhZhR9YXY1KlGeNkO2k41iuHOzTqPrf4uptPMh4ZhE1XEkCT+CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a54f9c13d2304448945bcdfa1c7700156b3aab40b70fb2783a73134c5e9edcca","last_reissued_at":"2026-05-18T03:50:08.911107Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:50:08.911107Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1206.0502","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":"2026-05-18T03:50:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yNiargZHIU9l6T+jEvMGigL8zwKnkloYh9XE/AlCamSWqLE8RTR9TxrnLWbVugDAsHPZjWYHGUuuqaGSK0arCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T21:44:25.903570Z"},"content_sha256":"67ad6ad3814118ca91f39c51f39dbf564a4cc980a1ba224a4c492d4f3e0e8793","schema_version":"1.0","event_id":"sha256:67ad6ad3814118ca91f39c51f39dbf564a4cc980a1ba224a4c492d4f3e0e8793"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:UVHZYE6SGBCERFC3ZX5BY5YACV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A 1.16-{\\mu}m-radius disk cavity in a sunflower-type circular photonic crystal with ultrahigh quality factor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Hong X. Tang, Xiankai Sun, Xufeng Zhang","submitted_at":"2012-06-04T00:14:23Z","abstract_excerpt":"We present a 1.16-\\mum-radius disk cavity with ultrahigh quality (Q) factor by embedding the disk into a sunflower-type circular photonic crystal (CPC). The band gap of the CPC reduces the bending loss of the whispering-gallery mode of the disk, leading to a simulated Q of 10^7, at least one order of magnitude higher than a bare disk of the same size. The design is experimentally verified with a record high loaded Q of 7.4 \\times 10^5 measured from an optimized device fabricated on a silicon-on-insulator substrate."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.0502","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":"2026-05-18T03:50:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yo8yjwGleE5JZ5EHfZH3tFVgpUaRr7POyBQ9omiSp+YMVg5QrKvPGpJAzoB1g5klWMJUizG6zmoKMLaebOfPBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T21:44:25.904270Z"},"content_sha256":"1f42e6c362a16db18be73f441d19efe50834a6da6b60abddce42152347647526","schema_version":"1.0","event_id":"sha256:1f42e6c362a16db18be73f441d19efe50834a6da6b60abddce42152347647526"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UVHZYE6SGBCERFC3ZX5BY5YACV/bundle.json","state_url":"https://pith.science/pith/UVHZYE6SGBCERFC3ZX5BY5YACV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UVHZYE6SGBCERFC3ZX5BY5YACV/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":"2026-05-30T21:44:25Z","links":{"resolver":"https://pith.science/pith/UVHZYE6SGBCERFC3ZX5BY5YACV","bundle":"https://pith.science/pith/UVHZYE6SGBCERFC3ZX5BY5YACV/bundle.json","state":"https://pith.science/pith/UVHZYE6SGBCERFC3ZX5BY5YACV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UVHZYE6SGBCERFC3ZX5BY5YACV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:UVHZYE6SGBCERFC3ZX5BY5YACV","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":"a1cc3c8092e8107f863536b606e6b6821e1b0235453558be46a3543860865ad6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-06-04T00:14:23Z","title_canon_sha256":"904b079aecd1bbffcf5357060734fd844ab9655094372d69149975f86e36abed"},"schema_version":"1.0","source":{"id":"1206.0502","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.0502","created_at":"2026-05-18T03:50:08Z"},{"alias_kind":"arxiv_version","alias_value":"1206.0502v1","created_at":"2026-05-18T03:50:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.0502","created_at":"2026-05-18T03:50:08Z"},{"alias_kind":"pith_short_12","alias_value":"UVHZYE6SGBCE","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"UVHZYE6SGBCERFC3","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"UVHZYE6S","created_at":"2026-05-18T12:27:25Z"}],"graph_snapshots":[{"event_id":"sha256:1f42e6c362a16db18be73f441d19efe50834a6da6b60abddce42152347647526","target":"graph","created_at":"2026-05-18T03:50:08Z","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 present a 1.16-\\mum-radius disk cavity with ultrahigh quality (Q) factor by embedding the disk into a sunflower-type circular photonic crystal (CPC). The band gap of the CPC reduces the bending loss of the whispering-gallery mode of the disk, leading to a simulated Q of 10^7, at least one order of magnitude higher than a bare disk of the same size. The design is experimentally verified with a record high loaded Q of 7.4 \\times 10^5 measured from an optimized device fabricated on a silicon-on-insulator substrate.","authors_text":"Hong X. Tang, Xiankai Sun, Xufeng Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-06-04T00:14:23Z","title":"A 1.16-{\\mu}m-radius disk cavity in a sunflower-type circular photonic crystal with ultrahigh quality factor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.0502","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":"sha256:67ad6ad3814118ca91f39c51f39dbf564a4cc980a1ba224a4c492d4f3e0e8793","target":"record","created_at":"2026-05-18T03:50:08Z","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":"a1cc3c8092e8107f863536b606e6b6821e1b0235453558be46a3543860865ad6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-06-04T00:14:23Z","title_canon_sha256":"904b079aecd1bbffcf5357060734fd844ab9655094372d69149975f86e36abed"},"schema_version":"1.0","source":{"id":"1206.0502","kind":"arxiv","version":1}},"canonical_sha256":"a54f9c13d2304448945bcdfa1c7700156b3aab40b70fb2783a73134c5e9edcca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a54f9c13d2304448945bcdfa1c7700156b3aab40b70fb2783a73134c5e9edcca","first_computed_at":"2026-05-18T03:50:08.911107Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:50:08.911107Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9MCHI1OpArRWq/pJfHUnOFiHzDmtGSYtYKEdhZhR9YXY1KlGeNkO2k41iuHOzTqPrf4uptPMh4ZhE1XEkCT+CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:50:08.911953Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.0502","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:67ad6ad3814118ca91f39c51f39dbf564a4cc980a1ba224a4c492d4f3e0e8793","sha256:1f42e6c362a16db18be73f441d19efe50834a6da6b60abddce42152347647526"],"state_sha256":"506a2ab3614e7966a2c90c429a44076843d4c120c90efc39d5b1d7bd4af26103"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TLWhJqcNC7ctfi1bq2+p1mRURckxTlwWm9V0XmfwqE8WUKcMFQOQ2QNKiMxScTuvAk0+xHlFlRryQeeYJH8BCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T21:44:25.911533Z","bundle_sha256":"7f940f4e936d01b3526702128f6eebf7f12c85d89806139a6aeb47539dc5333e"}}