{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:7SJQTHQDVZHYPHKFRF66RHSLVA","short_pith_number":"pith:7SJQTHQD","canonical_record":{"source":{"id":"1202.2521","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-02-12T11:53:38Z","cross_cats_sorted":[],"title_canon_sha256":"15a436af02b2ffebe068848f9c26035193f233635397bab01851e7514552a156","abstract_canon_sha256":"05142c156a2d699c012846f2838fbc8f694252f7870ad809cc3bf03f1b28b5a1"},"schema_version":"1.0"},"canonical_sha256":"fc93099e03ae4f879d45897de89e4ba8365967554dc330e85200a8f381a866b6","source":{"kind":"arxiv","id":"1202.2521","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.2521","created_at":"2026-05-18T04:02:26Z"},{"alias_kind":"arxiv_version","alias_value":"1202.2521v1","created_at":"2026-05-18T04:02:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.2521","created_at":"2026-05-18T04:02:26Z"},{"alias_kind":"pith_short_12","alias_value":"7SJQTHQDVZHY","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"7SJQTHQDVZHYPHKF","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"7SJQTHQD","created_at":"2026-05-18T12:26:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:7SJQTHQDVZHYPHKFRF66RHSLVA","target":"record","payload":{"canonical_record":{"source":{"id":"1202.2521","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-02-12T11:53:38Z","cross_cats_sorted":[],"title_canon_sha256":"15a436af02b2ffebe068848f9c26035193f233635397bab01851e7514552a156","abstract_canon_sha256":"05142c156a2d699c012846f2838fbc8f694252f7870ad809cc3bf03f1b28b5a1"},"schema_version":"1.0"},"canonical_sha256":"fc93099e03ae4f879d45897de89e4ba8365967554dc330e85200a8f381a866b6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:02:26.303016Z","signature_b64":"4dWmv0ZGn0/XOEyTaRSTgL9jq3Z/787bbUYVk9BVD4nTRcdyFOS5jh8Z0XUb35T3DYoLfsDBzsTuG+KF0NkLDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fc93099e03ae4f879d45897de89e4ba8365967554dc330e85200a8f381a866b6","last_reissued_at":"2026-05-18T04:02:26.302533Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:02:26.302533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1202.2521","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":"2026-05-18T04:02:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zqlKbjDS/Hmmn55QCnx19SuAgG7+g7yR9wPqLQHXUDE2PL2m63OoWvLDIfFvxbRhQ0RHVBuvZ68w9GAMkQNwAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T19:01:27.618921Z"},"content_sha256":"280245803b619e6b207d611f3d0ad7560b19bb66863c762174753b8f44921585","schema_version":"1.0","event_id":"sha256:280245803b619e6b207d611f3d0ad7560b19bb66863c762174753b8f44921585"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:7SJQTHQDVZHYPHKFRF66RHSLVA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Actively tunable optical Yagi-Uda nanoantenna with bistable emission characteristics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Andrey E. Miroshnichenko, Ivan S. Maksymov, Yuri S. Kivshar","submitted_at":"2012-02-12T11:53:38Z","abstract_excerpt":"We suggest and study theoretically a novel type of optical Yagi-Uda nanoantennas tunable via variation of the free-carrier density of a semiconductor disk placed in a gap of a metallic dipole feeding element. Unlike its narrowband all-metal counterparts, this nanoantenna exhibits a broadband unidirectional emission and demonstrates a bistable response in a preferential direction of the far-field zone, which opens up unique possibilities for ultrafast control of subwavelength light not attainable with dipole or bowtie architectures."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.2521","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":"2026-05-18T04:02:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hBCrTrkWTZYwFCNV88tTgQDWcCtc6dNZFL03eg8Z5mBSTrjR80cyIQoNobiZizIzJ4LtRqLsa8U4b4uDwsTrAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T19:01:27.619429Z"},"content_sha256":"7138d1a39ba6cd6f5d51787674854a54dc3284eb9ebf7db9cbced24c60b12ca0","schema_version":"1.0","event_id":"sha256:7138d1a39ba6cd6f5d51787674854a54dc3284eb9ebf7db9cbced24c60b12ca0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7SJQTHQDVZHYPHKFRF66RHSLVA/bundle.json","state_url":"https://pith.science/pith/7SJQTHQDVZHYPHKFRF66RHSLVA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7SJQTHQDVZHYPHKFRF66RHSLVA/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":"2026-05-27T19:01:27Z","links":{"resolver":"https://pith.science/pith/7SJQTHQDVZHYPHKFRF66RHSLVA","bundle":"https://pith.science/pith/7SJQTHQDVZHYPHKFRF66RHSLVA/bundle.json","state":"https://pith.science/pith/7SJQTHQDVZHYPHKFRF66RHSLVA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7SJQTHQDVZHYPHKFRF66RHSLVA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:7SJQTHQDVZHYPHKFRF66RHSLVA","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":"05142c156a2d699c012846f2838fbc8f694252f7870ad809cc3bf03f1b28b5a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-02-12T11:53:38Z","title_canon_sha256":"15a436af02b2ffebe068848f9c26035193f233635397bab01851e7514552a156"},"schema_version":"1.0","source":{"id":"1202.2521","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.2521","created_at":"2026-05-18T04:02:26Z"},{"alias_kind":"arxiv_version","alias_value":"1202.2521v1","created_at":"2026-05-18T04:02:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.2521","created_at":"2026-05-18T04:02:26Z"},{"alias_kind":"pith_short_12","alias_value":"7SJQTHQDVZHY","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"7SJQTHQDVZHYPHKF","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"7SJQTHQD","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:7138d1a39ba6cd6f5d51787674854a54dc3284eb9ebf7db9cbced24c60b12ca0","target":"graph","created_at":"2026-05-18T04:02:26Z","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 suggest and study theoretically a novel type of optical Yagi-Uda nanoantennas tunable via variation of the free-carrier density of a semiconductor disk placed in a gap of a metallic dipole feeding element. Unlike its narrowband all-metal counterparts, this nanoantenna exhibits a broadband unidirectional emission and demonstrates a bistable response in a preferential direction of the far-field zone, which opens up unique possibilities for ultrafast control of subwavelength light not attainable with dipole or bowtie architectures.","authors_text":"Andrey E. Miroshnichenko, Ivan S. Maksymov, Yuri S. Kivshar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-02-12T11:53:38Z","title":"Actively tunable optical Yagi-Uda nanoantenna with bistable emission characteristics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.2521","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":"sha256:280245803b619e6b207d611f3d0ad7560b19bb66863c762174753b8f44921585","target":"record","created_at":"2026-05-18T04:02:26Z","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":"05142c156a2d699c012846f2838fbc8f694252f7870ad809cc3bf03f1b28b5a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-02-12T11:53:38Z","title_canon_sha256":"15a436af02b2ffebe068848f9c26035193f233635397bab01851e7514552a156"},"schema_version":"1.0","source":{"id":"1202.2521","kind":"arxiv","version":1}},"canonical_sha256":"fc93099e03ae4f879d45897de89e4ba8365967554dc330e85200a8f381a866b6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fc93099e03ae4f879d45897de89e4ba8365967554dc330e85200a8f381a866b6","first_computed_at":"2026-05-18T04:02:26.302533Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:02:26.302533Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4dWmv0ZGn0/XOEyTaRSTgL9jq3Z/787bbUYVk9BVD4nTRcdyFOS5jh8Z0XUb35T3DYoLfsDBzsTuG+KF0NkLDA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:02:26.303016Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.2521","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:280245803b619e6b207d611f3d0ad7560b19bb66863c762174753b8f44921585","sha256:7138d1a39ba6cd6f5d51787674854a54dc3284eb9ebf7db9cbced24c60b12ca0"],"state_sha256":"ba23889f9c7ace6a6b99108a7983b29ee11cb002a57cea112d5785b33ee11f33"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9pTWeeqQN2+9TUWNmX+ZewA6SVXRmWvnNg1SFmpCcci6aFv9Q0kJji3KLWtXcqx8iZhKepv0IEL1SWOmfrK4BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T19:01:27.622326Z","bundle_sha256":"bc56922df22a021426f30180038f5f24a423aa18297f4f2f9fa927028b9058dc"}}