{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:LIHNQC3IX4BI6LGILIJ7UAGHPZ","short_pith_number":"pith:LIHNQC3I","canonical_record":{"source":{"id":"1507.00086","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-07-01T01:33:04Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"84fbccf07310d3f56526973cc5802f7ece1848c4c60f51158a0c240a6b06cc4e","abstract_canon_sha256":"0e7c4bc0911df5af1511cc818654a3f380d36f8f058c06a839e7e705b146b87e"},"schema_version":"1.0"},"canonical_sha256":"5a0ed80b68bf028f2cc85a13fa00c77e73df409b51916e8b7b330c1f79708b71","source":{"kind":"arxiv","id":"1507.00086","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.00086","created_at":"2026-05-18T01:37:30Z"},{"alias_kind":"arxiv_version","alias_value":"1507.00086v1","created_at":"2026-05-18T01:37:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.00086","created_at":"2026-05-18T01:37:30Z"},{"alias_kind":"pith_short_12","alias_value":"LIHNQC3IX4BI","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"LIHNQC3IX4BI6LGI","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"LIHNQC3I","created_at":"2026-05-18T12:29:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:LIHNQC3IX4BI6LGILIJ7UAGHPZ","target":"record","payload":{"canonical_record":{"source":{"id":"1507.00086","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-07-01T01:33:04Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"84fbccf07310d3f56526973cc5802f7ece1848c4c60f51158a0c240a6b06cc4e","abstract_canon_sha256":"0e7c4bc0911df5af1511cc818654a3f380d36f8f058c06a839e7e705b146b87e"},"schema_version":"1.0"},"canonical_sha256":"5a0ed80b68bf028f2cc85a13fa00c77e73df409b51916e8b7b330c1f79708b71","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:37:30.619282Z","signature_b64":"2/9bLXckHmil2j2NI+xAgP1j3D2e3xSrF6CWrfLE5fW2Ta9cpAAqNFzXOX8vPJrJhyYc136Y9scZpdYFqAFnCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5a0ed80b68bf028f2cc85a13fa00c77e73df409b51916e8b7b330c1f79708b71","last_reissued_at":"2026-05-18T01:37:30.618722Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:37:30.618722Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.00086","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":"2026-05-18T01:37:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ffX4sz10kItUJdm2SVeGa2B2jYtFaYt/ySvyvmGnJfDvftb6nOQDCjwBfVuVENQHzabvCABb1y/0S04bSLVNAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:24:15.274068Z"},"content_sha256":"756a812a05568769162cae1b4d339fb3de853ca6635a4089dc1374c3324071ae","schema_version":"1.0","event_id":"sha256:756a812a05568769162cae1b4d339fb3de853ca6635a4089dc1374c3324071ae"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:LIHNQC3IX4BI6LGILIJ7UAGHPZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Unidirectional and Wavelength Selective Photonic Sphere-Array Nanoantennas","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"physics.optics","authors_text":"Wallace C.H. Choy, Wei E.I. Sha, Weng Cho Chew, Yang G. Liu","submitted_at":"2015-07-01T01:33:04Z","abstract_excerpt":"We design a photonic sphere-array nanoantenna (NA) exhibiting both strong directionality and wavelength selectivity. Although the geometric configuration of the photonic NA resembles a plasmonic Yagi-Uda NA, it has different working principles, and most importantly, reduces the inherent metallic loss from plasmonic elements. For any selected optical wavelength, a sharp Fano-resonance by the reflector is tunable to overlap spectrally with a wider dipole resonance by the sphere-chain director leading to the high directionality. The work provides design principles for directional and selective ph"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.00086","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":"2026-05-18T01:37:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VOiFDnuloHlCpD55odEg51ircVbqVzF3rxdTFsnaQCfV5SaE1FMYji94zar/5SbURUuZ9uGIWbXxQ8WXoY43BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T22:24:15.274710Z"},"content_sha256":"14b58c45bf0a61ff0f1cf53c3d0ea2eec13c6685e091dd95dd6b93611ab0638e","schema_version":"1.0","event_id":"sha256:14b58c45bf0a61ff0f1cf53c3d0ea2eec13c6685e091dd95dd6b93611ab0638e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LIHNQC3IX4BI6LGILIJ7UAGHPZ/bundle.json","state_url":"https://pith.science/pith/LIHNQC3IX4BI6LGILIJ7UAGHPZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LIHNQC3IX4BI6LGILIJ7UAGHPZ/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":"2026-05-27T22:24:15Z","links":{"resolver":"https://pith.science/pith/LIHNQC3IX4BI6LGILIJ7UAGHPZ","bundle":"https://pith.science/pith/LIHNQC3IX4BI6LGILIJ7UAGHPZ/bundle.json","state":"https://pith.science/pith/LIHNQC3IX4BI6LGILIJ7UAGHPZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LIHNQC3IX4BI6LGILIJ7UAGHPZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:LIHNQC3IX4BI6LGILIJ7UAGHPZ","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":"0e7c4bc0911df5af1511cc818654a3f380d36f8f058c06a839e7e705b146b87e","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-07-01T01:33:04Z","title_canon_sha256":"84fbccf07310d3f56526973cc5802f7ece1848c4c60f51158a0c240a6b06cc4e"},"schema_version":"1.0","source":{"id":"1507.00086","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.00086","created_at":"2026-05-18T01:37:30Z"},{"alias_kind":"arxiv_version","alias_value":"1507.00086v1","created_at":"2026-05-18T01:37:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.00086","created_at":"2026-05-18T01:37:30Z"},{"alias_kind":"pith_short_12","alias_value":"LIHNQC3IX4BI","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"LIHNQC3IX4BI6LGI","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"LIHNQC3I","created_at":"2026-05-18T12:29:29Z"}],"graph_snapshots":[{"event_id":"sha256:14b58c45bf0a61ff0f1cf53c3d0ea2eec13c6685e091dd95dd6b93611ab0638e","target":"graph","created_at":"2026-05-18T01:37:30Z","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 design a photonic sphere-array nanoantenna (NA) exhibiting both strong directionality and wavelength selectivity. Although the geometric configuration of the photonic NA resembles a plasmonic Yagi-Uda NA, it has different working principles, and most importantly, reduces the inherent metallic loss from plasmonic elements. For any selected optical wavelength, a sharp Fano-resonance by the reflector is tunable to overlap spectrally with a wider dipole resonance by the sphere-chain director leading to the high directionality. The work provides design principles for directional and selective ph","authors_text":"Wallace C.H. Choy, Wei E.I. Sha, Weng Cho Chew, Yang G. Liu","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-07-01T01:33:04Z","title":"Unidirectional and Wavelength Selective Photonic Sphere-Array Nanoantennas"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.00086","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":"sha256:756a812a05568769162cae1b4d339fb3de853ca6635a4089dc1374c3324071ae","target":"record","created_at":"2026-05-18T01:37:30Z","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":"0e7c4bc0911df5af1511cc818654a3f380d36f8f058c06a839e7e705b146b87e","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-07-01T01:33:04Z","title_canon_sha256":"84fbccf07310d3f56526973cc5802f7ece1848c4c60f51158a0c240a6b06cc4e"},"schema_version":"1.0","source":{"id":"1507.00086","kind":"arxiv","version":1}},"canonical_sha256":"5a0ed80b68bf028f2cc85a13fa00c77e73df409b51916e8b7b330c1f79708b71","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5a0ed80b68bf028f2cc85a13fa00c77e73df409b51916e8b7b330c1f79708b71","first_computed_at":"2026-05-18T01:37:30.618722Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:30.618722Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2/9bLXckHmil2j2NI+xAgP1j3D2e3xSrF6CWrfLE5fW2Ta9cpAAqNFzXOX8vPJrJhyYc136Y9scZpdYFqAFnCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:30.619282Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.00086","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:756a812a05568769162cae1b4d339fb3de853ca6635a4089dc1374c3324071ae","sha256:14b58c45bf0a61ff0f1cf53c3d0ea2eec13c6685e091dd95dd6b93611ab0638e"],"state_sha256":"53ff454f4e4e537290cd9e8c2d16e15e51c962e41c6dbe9c8e2203d0d6bc7119"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y/yX+ZHNY7iksGYSvMkTztRIIA1qE3BwpfIG3Q7GFaE1zxV2ZJ3otqFF6jX32W1vXm1Uk7ELDD5naXSalhbeDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T22:24:15.278137Z","bundle_sha256":"2f68f0f530508bd2dc9f0657e0c9ef138b9ae97508210921b079080f115b8c8c"}}