{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:Q4PMZ6PNKEC5WL7Y2CO6M333AX","short_pith_number":"pith:Q4PMZ6PN","canonical_record":{"source":{"id":"1905.03363","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-05-08T21:50:37Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"6e28f90f9d833660178129bb84881aee1ee89689842e5472b565466608cdaf38","abstract_canon_sha256":"6c0459402a4eadba9cfef4e5e8e6e2541d3be5235d9d7fe23092431f9581b603"},"schema_version":"1.0"},"canonical_sha256":"871eccf9ed5105db2ff8d09de66f7b05ca4bd57d5b72f047fd9122b43923ae4e","source":{"kind":"arxiv","id":"1905.03363","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.03363","created_at":"2026-05-17T23:46:40Z"},{"alias_kind":"arxiv_version","alias_value":"1905.03363v1","created_at":"2026-05-17T23:46:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.03363","created_at":"2026-05-17T23:46:40Z"},{"alias_kind":"pith_short_12","alias_value":"Q4PMZ6PNKEC5","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"Q4PMZ6PNKEC5WL7Y","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"Q4PMZ6PN","created_at":"2026-05-18T12:33:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:Q4PMZ6PNKEC5WL7Y2CO6M333AX","target":"record","payload":{"canonical_record":{"source":{"id":"1905.03363","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-05-08T21:50:37Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"6e28f90f9d833660178129bb84881aee1ee89689842e5472b565466608cdaf38","abstract_canon_sha256":"6c0459402a4eadba9cfef4e5e8e6e2541d3be5235d9d7fe23092431f9581b603"},"schema_version":"1.0"},"canonical_sha256":"871eccf9ed5105db2ff8d09de66f7b05ca4bd57d5b72f047fd9122b43923ae4e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:46:40.241632Z","signature_b64":"xGjop8OvqC3eTs9W+R632pQ3LgXqtlXH0qvrZm4KIV/wCJv0usmmzzo6McwRMYWObG3yAFJeMxu0Uv0mR7A8Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"871eccf9ed5105db2ff8d09de66f7b05ca4bd57d5b72f047fd9122b43923ae4e","last_reissued_at":"2026-05-17T23:46:40.240745Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:46:40.240745Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.03363","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":"2026-05-17T23:46:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/ENpE1x54h/JbMfw4bVmvVC26COjS9xMfb4rl3VmN+Z5K/Gae5waqgaiB+ipT8OpxrUJfKIzxr0oBofH+8HrAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:54:11.843576Z"},"content_sha256":"515b4e37792cb1b78f15c025e8e9391895b911526707452a54684857686be534","schema_version":"1.0","event_id":"sha256:515b4e37792cb1b78f15c025e8e9391895b911526707452a54684857686be534"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:Q4PMZ6PNKEC5WL7Y2CO6M333AX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Highly efficient light extraction and directional emission from diamond color centers using planar Yagi-Uda antennas","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"physics.optics","authors_text":"Assegid M. Flatae, Christoph Wild, Eckhard W\\\"orner, Gregor Schulte, Holger Sch\\\"onherr, Hossam Galal, Lorenzo Giuntini, Mario Agio, Nicla Gelli, Silvio Sciortino, Stefano Lagomarsino","submitted_at":"2019-05-08T21:50:37Z","abstract_excerpt":"Color centers in diamond represent a promising platform for developing solid-state single-photon sources and spin-photon interfaces as building blocks for photonics-based quantum technologies. However, although they exhibit a combination of features that make them so attractive, they also suffer from limited control in their emission properties, such as brightness, directionality, and polarization to cite a few. In this paper we present implementations and the experimental investigation of planar Yagi-Uda antennas in diamond, demonstrating highly efficient light extraction and directional emis"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.03363","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":"2026-05-17T23:46:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kvCalc2W7TQCf3NrFztbuGYoOCKLllGgcTIDdFhk2R85eUaDzT33bCjbhrZYf7e9ChpFjJ3LtuAFN1dbeCxfCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T16:54:11.844226Z"},"content_sha256":"6c9d19fd527717f1cec98fc73be8cebccd0ee9f7e54a5581ab100bcedbf853cd","schema_version":"1.0","event_id":"sha256:6c9d19fd527717f1cec98fc73be8cebccd0ee9f7e54a5581ab100bcedbf853cd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Q4PMZ6PNKEC5WL7Y2CO6M333AX/bundle.json","state_url":"https://pith.science/pith/Q4PMZ6PNKEC5WL7Y2CO6M333AX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Q4PMZ6PNKEC5WL7Y2CO6M333AX/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":"2026-05-26T16:54:11Z","links":{"resolver":"https://pith.science/pith/Q4PMZ6PNKEC5WL7Y2CO6M333AX","bundle":"https://pith.science/pith/Q4PMZ6PNKEC5WL7Y2CO6M333AX/bundle.json","state":"https://pith.science/pith/Q4PMZ6PNKEC5WL7Y2CO6M333AX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Q4PMZ6PNKEC5WL7Y2CO6M333AX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:Q4PMZ6PNKEC5WL7Y2CO6M333AX","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":"6c0459402a4eadba9cfef4e5e8e6e2541d3be5235d9d7fe23092431f9581b603","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-05-08T21:50:37Z","title_canon_sha256":"6e28f90f9d833660178129bb84881aee1ee89689842e5472b565466608cdaf38"},"schema_version":"1.0","source":{"id":"1905.03363","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.03363","created_at":"2026-05-17T23:46:40Z"},{"alias_kind":"arxiv_version","alias_value":"1905.03363v1","created_at":"2026-05-17T23:46:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.03363","created_at":"2026-05-17T23:46:40Z"},{"alias_kind":"pith_short_12","alias_value":"Q4PMZ6PNKEC5","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"Q4PMZ6PNKEC5WL7Y","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"Q4PMZ6PN","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:6c9d19fd527717f1cec98fc73be8cebccd0ee9f7e54a5581ab100bcedbf853cd","target":"graph","created_at":"2026-05-17T23:46:40Z","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":"Color centers in diamond represent a promising platform for developing solid-state single-photon sources and spin-photon interfaces as building blocks for photonics-based quantum technologies. However, although they exhibit a combination of features that make them so attractive, they also suffer from limited control in their emission properties, such as brightness, directionality, and polarization to cite a few. In this paper we present implementations and the experimental investigation of planar Yagi-Uda antennas in diamond, demonstrating highly efficient light extraction and directional emis","authors_text":"Assegid M. Flatae, Christoph Wild, Eckhard W\\\"orner, Gregor Schulte, Holger Sch\\\"onherr, Hossam Galal, Lorenzo Giuntini, Mario Agio, Nicla Gelli, Silvio Sciortino, Stefano Lagomarsino","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-05-08T21:50:37Z","title":"Highly efficient light extraction and directional emission from diamond color centers using planar Yagi-Uda antennas"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.03363","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":"sha256:515b4e37792cb1b78f15c025e8e9391895b911526707452a54684857686be534","target":"record","created_at":"2026-05-17T23:46:40Z","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":"6c0459402a4eadba9cfef4e5e8e6e2541d3be5235d9d7fe23092431f9581b603","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-05-08T21:50:37Z","title_canon_sha256":"6e28f90f9d833660178129bb84881aee1ee89689842e5472b565466608cdaf38"},"schema_version":"1.0","source":{"id":"1905.03363","kind":"arxiv","version":1}},"canonical_sha256":"871eccf9ed5105db2ff8d09de66f7b05ca4bd57d5b72f047fd9122b43923ae4e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"871eccf9ed5105db2ff8d09de66f7b05ca4bd57d5b72f047fd9122b43923ae4e","first_computed_at":"2026-05-17T23:46:40.240745Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:40.240745Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xGjop8OvqC3eTs9W+R632pQ3LgXqtlXH0qvrZm4KIV/wCJv0usmmzzo6McwRMYWObG3yAFJeMxu0Uv0mR7A8Dw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:40.241632Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.03363","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:515b4e37792cb1b78f15c025e8e9391895b911526707452a54684857686be534","sha256:6c9d19fd527717f1cec98fc73be8cebccd0ee9f7e54a5581ab100bcedbf853cd"],"state_sha256":"01bc9c688e826956c1e2e6092a3ee6f5af0ab195d98d390fe73f246ead5ff609"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R6+KEMoYP79CAMkOC4OAXsq2f4D+N25FvY7LWN3HeWhBEpjPKcD6leqU1MqhmGejzjSkHHx/oIbZhQ/5CP3DCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T16:54:11.847569Z","bundle_sha256":"166f13b57d1549690a40ac4e790c8dd74605d4346c638a04bcd79fd603d90702"}}