{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:65GCMUR443NQE6ELHZN77WAB5Q","short_pith_number":"pith:65GCMUR4","canonical_record":{"source":{"id":"1301.3620","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-01-16T08:19:10Z","cross_cats_sorted":[],"title_canon_sha256":"5a258045fe6c208269703de9824933424c1fdfc5b9e87540aa45df9caf8887f0","abstract_canon_sha256":"58fd39b460096e52cf72a5a99130ed8da5088e8612c669ecb2304baff47bbb3f"},"schema_version":"1.0"},"canonical_sha256":"f74c26523ce6db02788b3e5bffd801ec184e872c42db65a2d4e80f4938244de9","source":{"kind":"arxiv","id":"1301.3620","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.3620","created_at":"2026-05-18T03:36:17Z"},{"alias_kind":"arxiv_version","alias_value":"1301.3620v1","created_at":"2026-05-18T03:36:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.3620","created_at":"2026-05-18T03:36:17Z"},{"alias_kind":"pith_short_12","alias_value":"65GCMUR443NQ","created_at":"2026-05-18T12:27:34Z"},{"alias_kind":"pith_short_16","alias_value":"65GCMUR443NQE6EL","created_at":"2026-05-18T12:27:34Z"},{"alias_kind":"pith_short_8","alias_value":"65GCMUR4","created_at":"2026-05-18T12:27:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:65GCMUR443NQE6ELHZN77WAB5Q","target":"record","payload":{"canonical_record":{"source":{"id":"1301.3620","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-01-16T08:19:10Z","cross_cats_sorted":[],"title_canon_sha256":"5a258045fe6c208269703de9824933424c1fdfc5b9e87540aa45df9caf8887f0","abstract_canon_sha256":"58fd39b460096e52cf72a5a99130ed8da5088e8612c669ecb2304baff47bbb3f"},"schema_version":"1.0"},"canonical_sha256":"f74c26523ce6db02788b3e5bffd801ec184e872c42db65a2d4e80f4938244de9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:36:17.310530Z","signature_b64":"aDDEPXSwLnw5/a3Bny1KlY9L2gxt0IqcWd5IP1wTj1JNoy+exBgq1IAm0BZ8+eEaIiCYmrwzW9+uiltMh+9gDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f74c26523ce6db02788b3e5bffd801ec184e872c42db65a2d4e80f4938244de9","last_reissued_at":"2026-05-18T03:36:17.309889Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:36:17.309889Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1301.3620","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":"2026-05-18T03:36:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nDLDid5+qWMCkojyYMZHsN6aZyJwEat9EMbatgkOV7h6N6aI6mvC6zKv25yjme7dWR0sZytEX9YG9C0YaAYnBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T18:19:17.113112Z"},"content_sha256":"502ae0ec502d38592633ad59b34384908870d69805dc2a5b902e85ed5ff59436","schema_version":"1.0","event_id":"sha256:502ae0ec502d38592633ad59b34384908870d69805dc2a5b902e85ed5ff59436"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:65GCMUR443NQE6ELHZN77WAB5Q","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Visible Metamaterial with Low Loss Made by Bottom-Up Self-Assembly","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Boyi Gong, Chunrong Luo, Sa Li, Xiaonong Wang, Xiaopeng Zhao, Yan Zhao, Zhenzhen Pan","submitted_at":"2013-01-16T08:19:10Z","abstract_excerpt":"Since the introduction of the artificially designed negative-index metamaterial (NIM) introduced in 2001, its extraordinary electromagnetic properties, which cannot be attained from naturally occurring materials, have continuously attracted many researchers to study them. Various types of NIMs with the resonant frequencies shifted from gigahertz all the way to higher frequencies have been actualized over the past decade. For the actual applications, the most fascinating and significant goal of research on NIMs is to achieve negative refraction at visible wavelengths. According to the effective"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.3620","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":"2026-05-18T03:36:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LHVleDrDi3cESQTOqpKRE5f+bzJv+BnkajrM/g9LjwcNt42O0vKXO+G+6JtxOpAFtoW/Hfnplp4W+/DtLaDtCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T18:19:17.113765Z"},"content_sha256":"3e3a35b7d3ab3733d79dff4ef1845667250ed75b2fc58d11116514beecb3b1fc","schema_version":"1.0","event_id":"sha256:3e3a35b7d3ab3733d79dff4ef1845667250ed75b2fc58d11116514beecb3b1fc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/65GCMUR443NQE6ELHZN77WAB5Q/bundle.json","state_url":"https://pith.science/pith/65GCMUR443NQE6ELHZN77WAB5Q/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/65GCMUR443NQE6ELHZN77WAB5Q/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":"2026-05-26T18:19:17Z","links":{"resolver":"https://pith.science/pith/65GCMUR443NQE6ELHZN77WAB5Q","bundle":"https://pith.science/pith/65GCMUR443NQE6ELHZN77WAB5Q/bundle.json","state":"https://pith.science/pith/65GCMUR443NQE6ELHZN77WAB5Q/state.json","well_known_bundle":"https://pith.science/.well-known/pith/65GCMUR443NQE6ELHZN77WAB5Q/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:65GCMUR443NQE6ELHZN77WAB5Q","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":"58fd39b460096e52cf72a5a99130ed8da5088e8612c669ecb2304baff47bbb3f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-01-16T08:19:10Z","title_canon_sha256":"5a258045fe6c208269703de9824933424c1fdfc5b9e87540aa45df9caf8887f0"},"schema_version":"1.0","source":{"id":"1301.3620","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.3620","created_at":"2026-05-18T03:36:17Z"},{"alias_kind":"arxiv_version","alias_value":"1301.3620v1","created_at":"2026-05-18T03:36:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.3620","created_at":"2026-05-18T03:36:17Z"},{"alias_kind":"pith_short_12","alias_value":"65GCMUR443NQ","created_at":"2026-05-18T12:27:34Z"},{"alias_kind":"pith_short_16","alias_value":"65GCMUR443NQE6EL","created_at":"2026-05-18T12:27:34Z"},{"alias_kind":"pith_short_8","alias_value":"65GCMUR4","created_at":"2026-05-18T12:27:34Z"}],"graph_snapshots":[{"event_id":"sha256:3e3a35b7d3ab3733d79dff4ef1845667250ed75b2fc58d11116514beecb3b1fc","target":"graph","created_at":"2026-05-18T03:36:17Z","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":"Since the introduction of the artificially designed negative-index metamaterial (NIM) introduced in 2001, its extraordinary electromagnetic properties, which cannot be attained from naturally occurring materials, have continuously attracted many researchers to study them. Various types of NIMs with the resonant frequencies shifted from gigahertz all the way to higher frequencies have been actualized over the past decade. For the actual applications, the most fascinating and significant goal of research on NIMs is to achieve negative refraction at visible wavelengths. According to the effective","authors_text":"Boyi Gong, Chunrong Luo, Sa Li, Xiaonong Wang, Xiaopeng Zhao, Yan Zhao, Zhenzhen Pan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-01-16T08:19:10Z","title":"A Visible Metamaterial with Low Loss Made by Bottom-Up Self-Assembly"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.3620","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":"sha256:502ae0ec502d38592633ad59b34384908870d69805dc2a5b902e85ed5ff59436","target":"record","created_at":"2026-05-18T03:36:17Z","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":"58fd39b460096e52cf72a5a99130ed8da5088e8612c669ecb2304baff47bbb3f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-01-16T08:19:10Z","title_canon_sha256":"5a258045fe6c208269703de9824933424c1fdfc5b9e87540aa45df9caf8887f0"},"schema_version":"1.0","source":{"id":"1301.3620","kind":"arxiv","version":1}},"canonical_sha256":"f74c26523ce6db02788b3e5bffd801ec184e872c42db65a2d4e80f4938244de9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f74c26523ce6db02788b3e5bffd801ec184e872c42db65a2d4e80f4938244de9","first_computed_at":"2026-05-18T03:36:17.309889Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:36:17.309889Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aDDEPXSwLnw5/a3Bny1KlY9L2gxt0IqcWd5IP1wTj1JNoy+exBgq1IAm0BZ8+eEaIiCYmrwzW9+uiltMh+9gDg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:36:17.310530Z","signed_message":"canonical_sha256_bytes"},"source_id":"1301.3620","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:502ae0ec502d38592633ad59b34384908870d69805dc2a5b902e85ed5ff59436","sha256:3e3a35b7d3ab3733d79dff4ef1845667250ed75b2fc58d11116514beecb3b1fc"],"state_sha256":"18feb51d9566ef8ba560b324d07500a07dd8b37a4114e27f562e4a3a66a1950a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mzjam3NbFHvu2slNDRBteRhyd3I4vwT3xpEzG/8K1zn6CbdUip6YYvFjfxSar0xre2Dxp3NeaCzQHbS+S2udCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T18:19:17.116289Z","bundle_sha256":"55b5c9c0afe0939ec88cfa0ba7c071dcf4a379da8515e3cdd7fe7e5290988b4f"}}