{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:VVEUMLLTB6VTY32RPA5HGGCRVV","short_pith_number":"pith:VVEUMLLT","canonical_record":{"source":{"id":"1404.4707","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2014-04-18T07:06:45Z","cross_cats_sorted":[],"title_canon_sha256":"bfe96f90c69e8a03efe83cfced07c199622bc85cc50d7216859e147e5afa4b66","abstract_canon_sha256":"3cd8e7ea9fc447db13f569b7e84e4c495c806b9b2ceb904f2648d6c17e201e22"},"schema_version":"1.0"},"canonical_sha256":"ad49462d730fab3c6f51783a731851ad7512aa3da6196ab44d964c7a96b17fbc","source":{"kind":"arxiv","id":"1404.4707","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.4707","created_at":"2026-05-18T02:53:55Z"},{"alias_kind":"arxiv_version","alias_value":"1404.4707v1","created_at":"2026-05-18T02:53:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.4707","created_at":"2026-05-18T02:53:55Z"},{"alias_kind":"pith_short_12","alias_value":"VVEUMLLTB6VT","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"VVEUMLLTB6VTY32R","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"VVEUMLLT","created_at":"2026-05-18T12:28:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:VVEUMLLTB6VTY32RPA5HGGCRVV","target":"record","payload":{"canonical_record":{"source":{"id":"1404.4707","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2014-04-18T07:06:45Z","cross_cats_sorted":[],"title_canon_sha256":"bfe96f90c69e8a03efe83cfced07c199622bc85cc50d7216859e147e5afa4b66","abstract_canon_sha256":"3cd8e7ea9fc447db13f569b7e84e4c495c806b9b2ceb904f2648d6c17e201e22"},"schema_version":"1.0"},"canonical_sha256":"ad49462d730fab3c6f51783a731851ad7512aa3da6196ab44d964c7a96b17fbc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:53:55.287472Z","signature_b64":"Evgaj52Oxe/eZsaABbsb/VOzG414oBahlkJUUsrAAvWF0rBD4xqpUsAgoM7OBQywqdvpbItFpKldyngBc0mFAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ad49462d730fab3c6f51783a731851ad7512aa3da6196ab44d964c7a96b17fbc","last_reissued_at":"2026-05-18T02:53:55.286734Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:53:55.286734Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1404.4707","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":"2026-05-18T02:53:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qsUcHs7lOyVmuNC8OHR6icRMaeyR+jaJOG0gC2TWnDX9HHI/VtJ35sSYn7N7IsgRJi578wSxJjrswVQKf9S4Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T18:37:29.558395Z"},"content_sha256":"9d4638d0825fd2bb67fb122bf9a602b37c7d5a5fa966bd95309c89cf15d0fb0d","schema_version":"1.0","event_id":"sha256:9d4638d0825fd2bb67fb122bf9a602b37c7d5a5fa966bd95309c89cf15d0fb0d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:VVEUMLLTB6VTY32RPA5HGGCRVV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Negative refractive index and higher-order harmonics in layered metallodielectric optical metamaterials","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Albert Polman, Ewold Verhagen, James Parsons, Ruben Maas","submitted_at":"2014-04-18T07:06:45Z","abstract_excerpt":"We study the propagation of light in a three-dimensional double-periodic Ag/TiO2 multilayer metamaterial composed of coupled plasmonic waveguides operating in the visible and UV spectral range. For these frequencies, light propagation in the plane of the waveguides is described by a negative phase velocity, while for the orthogonal direction light propagation is described by a Bloch wave composed of a large number of harmonics. As a result, the material cannot generally be described by a single phase index: decomposing the Bloch wave into different harmonics we show that for the wavelength ran"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.4707","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":"2026-05-18T02:53:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2dPHnub/RDtMyeFk7GOQ3PSpgnxcxraII+VNKP1TMrMpOnpV3v4ffH1RTvqa/I2rYtpMb4Uo8X2gmy8vr9MBDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T18:37:29.559075Z"},"content_sha256":"8eb721f17aab93b38a520b8fa547cffe5793d1f249beda1cbadf4c2f10308dca","schema_version":"1.0","event_id":"sha256:8eb721f17aab93b38a520b8fa547cffe5793d1f249beda1cbadf4c2f10308dca"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VVEUMLLTB6VTY32RPA5HGGCRVV/bundle.json","state_url":"https://pith.science/pith/VVEUMLLTB6VTY32RPA5HGGCRVV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VVEUMLLTB6VTY32RPA5HGGCRVV/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":"2026-06-06T18:37:29Z","links":{"resolver":"https://pith.science/pith/VVEUMLLTB6VTY32RPA5HGGCRVV","bundle":"https://pith.science/pith/VVEUMLLTB6VTY32RPA5HGGCRVV/bundle.json","state":"https://pith.science/pith/VVEUMLLTB6VTY32RPA5HGGCRVV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VVEUMLLTB6VTY32RPA5HGGCRVV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:VVEUMLLTB6VTY32RPA5HGGCRVV","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":"3cd8e7ea9fc447db13f569b7e84e4c495c806b9b2ceb904f2648d6c17e201e22","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2014-04-18T07:06:45Z","title_canon_sha256":"bfe96f90c69e8a03efe83cfced07c199622bc85cc50d7216859e147e5afa4b66"},"schema_version":"1.0","source":{"id":"1404.4707","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1404.4707","created_at":"2026-05-18T02:53:55Z"},{"alias_kind":"arxiv_version","alias_value":"1404.4707v1","created_at":"2026-05-18T02:53:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1404.4707","created_at":"2026-05-18T02:53:55Z"},{"alias_kind":"pith_short_12","alias_value":"VVEUMLLTB6VT","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"VVEUMLLTB6VTY32R","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"VVEUMLLT","created_at":"2026-05-18T12:28:54Z"}],"graph_snapshots":[{"event_id":"sha256:8eb721f17aab93b38a520b8fa547cffe5793d1f249beda1cbadf4c2f10308dca","target":"graph","created_at":"2026-05-18T02:53:55Z","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 study the propagation of light in a three-dimensional double-periodic Ag/TiO2 multilayer metamaterial composed of coupled plasmonic waveguides operating in the visible and UV spectral range. For these frequencies, light propagation in the plane of the waveguides is described by a negative phase velocity, while for the orthogonal direction light propagation is described by a Bloch wave composed of a large number of harmonics. As a result, the material cannot generally be described by a single phase index: decomposing the Bloch wave into different harmonics we show that for the wavelength ran","authors_text":"Albert Polman, Ewold Verhagen, James Parsons, Ruben Maas","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2014-04-18T07:06:45Z","title":"Negative refractive index and higher-order harmonics in layered metallodielectric optical metamaterials"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1404.4707","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":"sha256:9d4638d0825fd2bb67fb122bf9a602b37c7d5a5fa966bd95309c89cf15d0fb0d","target":"record","created_at":"2026-05-18T02:53:55Z","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":"3cd8e7ea9fc447db13f569b7e84e4c495c806b9b2ceb904f2648d6c17e201e22","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2014-04-18T07:06:45Z","title_canon_sha256":"bfe96f90c69e8a03efe83cfced07c199622bc85cc50d7216859e147e5afa4b66"},"schema_version":"1.0","source":{"id":"1404.4707","kind":"arxiv","version":1}},"canonical_sha256":"ad49462d730fab3c6f51783a731851ad7512aa3da6196ab44d964c7a96b17fbc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ad49462d730fab3c6f51783a731851ad7512aa3da6196ab44d964c7a96b17fbc","first_computed_at":"2026-05-18T02:53:55.286734Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:53:55.286734Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Evgaj52Oxe/eZsaABbsb/VOzG414oBahlkJUUsrAAvWF0rBD4xqpUsAgoM7OBQywqdvpbItFpKldyngBc0mFAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:53:55.287472Z","signed_message":"canonical_sha256_bytes"},"source_id":"1404.4707","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9d4638d0825fd2bb67fb122bf9a602b37c7d5a5fa966bd95309c89cf15d0fb0d","sha256:8eb721f17aab93b38a520b8fa547cffe5793d1f249beda1cbadf4c2f10308dca"],"state_sha256":"b8e33c3a5b08e550183671748d497847042ad91d67b16d9404a1c58aadd0f108"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y+0KmK+PtQzyXkSWF9FovaqTsaPM+zVJB8YDVj8DAc+w9hlNCqDvTNFkQXo2BeNTT83oUTT0ZVWD6WQCMyzRAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T18:37:29.562594Z","bundle_sha256":"cfd3431bccfdd40c34a77959c9d329dfb1be2c0f4190d85143bd24590e189d21"}}