{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:JWKOF2M6XGJQF3NCJRFHZJDI2W","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":"26aeab1f36c47d5e3237ea8306a507e828015187711b86f3e9777cadebbf2f1f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-04-12T11:32:50Z","title_canon_sha256":"6e67377a1733295821c37a41b6f4bd0bb0907adaf4cfcf02d67f844ca0cc2a1a"},"schema_version":"1.0","source":{"id":"1804.04433","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.04433","created_at":"2026-05-18T00:18:37Z"},{"alias_kind":"arxiv_version","alias_value":"1804.04433v1","created_at":"2026-05-18T00:18:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.04433","created_at":"2026-05-18T00:18:37Z"},{"alias_kind":"pith_short_12","alias_value":"JWKOF2M6XGJQ","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"JWKOF2M6XGJQF3NC","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"JWKOF2M6","created_at":"2026-05-18T12:32:33Z"}],"graph_snapshots":[{"event_id":"sha256:869658da03bc0f801642fd4f42992d266967c11e46d3f8332882879f971d351c","target":"graph","created_at":"2026-05-18T00:18:37Z","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 propose highly efficient hybrid plasmonic bullseye antennas for collecting photon emission from nm-sized quantum emitters. In our approach, the emitter radiation is coupled to surface plasmon polaritons that are consequently converted into highly directional out-of-plane emission. The proposed configuration consists of a high-index titania bullseye grating separated from a planar silver film by a thin low-index silica spacer layer. Such hybrid systems are theoretically capable of directing 85 % of the dipole emission into a 0.9 NA objective, while featuring a spectrally narrow-band tunable ","authors_text":"Alexandra Boltasseva, Mikhail Y. Shalaginov, Oksana Makarova, Sebastian K.H. Andersen, Sergey I. Bozhevolnyi, Simeon Bogdanov, Vladimir M. Shalaev, Yi Xuan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-04-12T11:32:50Z","title":"Hybrid Plasmonic Bullseye Antennas for Efficient Photon Collection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.04433","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:e350b77780afc4ea206a9bf7221897efc22240498df57c4b15fb19def9233893","target":"record","created_at":"2026-05-18T00:18:37Z","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":"26aeab1f36c47d5e3237ea8306a507e828015187711b86f3e9777cadebbf2f1f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-04-12T11:32:50Z","title_canon_sha256":"6e67377a1733295821c37a41b6f4bd0bb0907adaf4cfcf02d67f844ca0cc2a1a"},"schema_version":"1.0","source":{"id":"1804.04433","kind":"arxiv","version":1}},"canonical_sha256":"4d94e2e99eb99302eda24c4a7ca468d5ba8e9cf646be578b46590bef7cd87568","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4d94e2e99eb99302eda24c4a7ca468d5ba8e9cf646be578b46590bef7cd87568","first_computed_at":"2026-05-18T00:18:37.570273Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:18:37.570273Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pq+IilAlerGgGLXEEaqYLFoQvUSrlNrbeTUlB4fdyRhIaYzFZcuMQUvJa22qltqmQDHoFoce+72kVWI4ToKhDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:18:37.570903Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.04433","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e350b77780afc4ea206a9bf7221897efc22240498df57c4b15fb19def9233893","sha256:869658da03bc0f801642fd4f42992d266967c11e46d3f8332882879f971d351c"],"state_sha256":"d948e97825a57bf0741ba05f3e8726c78719d16270411eda44d99d7698316d48"}