{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:UGIKXIKWZZOZIVF2JYEYKOUASH","short_pith_number":"pith:UGIKXIKW","canonical_record":{"source":{"id":"1802.02784","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-02-08T10:22:48Z","cross_cats_sorted":[],"title_canon_sha256":"dedaa36634ae24e04df72f5bc3f2e2e98d800bd6b59a648645ebd76b9f1ac16e","abstract_canon_sha256":"3613cd9c7d6c1474becb616681527dc4ce354ed789abb7a105c3da83b6400cf2"},"schema_version":"1.0"},"canonical_sha256":"a190aba156ce5d9454ba4e09853a8091e305b3b83a7abeec06617642e5d3c730","source":{"kind":"arxiv","id":"1802.02784","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.02784","created_at":"2026-05-18T00:17:23Z"},{"alias_kind":"arxiv_version","alias_value":"1802.02784v2","created_at":"2026-05-18T00:17:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.02784","created_at":"2026-05-18T00:17:23Z"},{"alias_kind":"pith_short_12","alias_value":"UGIKXIKWZZOZ","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"UGIKXIKWZZOZIVF2","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"UGIKXIKW","created_at":"2026-05-18T12:32:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:UGIKXIKWZZOZIVF2JYEYKOUASH","target":"record","payload":{"canonical_record":{"source":{"id":"1802.02784","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-02-08T10:22:48Z","cross_cats_sorted":[],"title_canon_sha256":"dedaa36634ae24e04df72f5bc3f2e2e98d800bd6b59a648645ebd76b9f1ac16e","abstract_canon_sha256":"3613cd9c7d6c1474becb616681527dc4ce354ed789abb7a105c3da83b6400cf2"},"schema_version":"1.0"},"canonical_sha256":"a190aba156ce5d9454ba4e09853a8091e305b3b83a7abeec06617642e5d3c730","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:17:23.769222Z","signature_b64":"/o0l9WYqWJhu0ubS4wjaZQhn3p7RwAJfCyCuAm8GK5x/viY1IafQyCufaydpbgr2MmRBjNWmHnO1E9XQo3jaBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a190aba156ce5d9454ba4e09853a8091e305b3b83a7abeec06617642e5d3c730","last_reissued_at":"2026-05-18T00:17:23.768668Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:17:23.768668Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.02784","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:17:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0tesunYecxh0jbDTzUxu1W9sQAXZvtTjlLY0jd4Jpag/8fpERNnUotPSJpijPjDhheaJ0LorkBY03pGwnE70Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T04:55:37.662421Z"},"content_sha256":"4850107a3bbd76f7750107b7f1c6a2677ee528b67f5495c1e8e0f1f7896cec2e","schema_version":"1.0","event_id":"sha256:4850107a3bbd76f7750107b7f1c6a2677ee528b67f5495c1e8e0f1f7896cec2e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:UGIKXIKWZZOZIVF2JYEYKOUASH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Acoustic Analogues of High-Index Optical Waveguide Devices","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.app-ph","authors_text":"Farzad Zangeneh-Nejad, Romain Fleury","submitted_at":"2018-02-08T10:22:48Z","abstract_excerpt":"High index optical waveguide devices such as slab waveguides, strip waveguides and fibers play extremely important roles in a wide range of modern applications including telecommunications, sensing, lasing, interferometry, and resonant amplification. Yet, transposing these advantageous applications from optics to acoustics remains a fundamental practical challenge, since most materials exhibit refractive indices lower than that of air for sound waves. Here, we demonstrate the relevance of acoustic metamaterials for tackling this pivotal problem. More specifically, we consider a metamaterial bu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.02784","kind":"arxiv","version":2},"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":"2026-05-18T00:17:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YSdNpm1g5y1NfngR6Nrq8R9+J6PCv7wPWlD5SJEqM181oJmnhb+tpIn26eQwPZhYNt/qJY9s7snjRiURfnY/Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T04:55:37.663113Z"},"content_sha256":"5b9012af3478ec131fe4b5e56bc4fdfdefa6754f6387749b533518887d22861c","schema_version":"1.0","event_id":"sha256:5b9012af3478ec131fe4b5e56bc4fdfdefa6754f6387749b533518887d22861c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UGIKXIKWZZOZIVF2JYEYKOUASH/bundle.json","state_url":"https://pith.science/pith/UGIKXIKWZZOZIVF2JYEYKOUASH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UGIKXIKWZZOZIVF2JYEYKOUASH/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":"2026-06-09T04:55:37Z","links":{"resolver":"https://pith.science/pith/UGIKXIKWZZOZIVF2JYEYKOUASH","bundle":"https://pith.science/pith/UGIKXIKWZZOZIVF2JYEYKOUASH/bundle.json","state":"https://pith.science/pith/UGIKXIKWZZOZIVF2JYEYKOUASH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UGIKXIKWZZOZIVF2JYEYKOUASH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:UGIKXIKWZZOZIVF2JYEYKOUASH","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":"3613cd9c7d6c1474becb616681527dc4ce354ed789abb7a105c3da83b6400cf2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-02-08T10:22:48Z","title_canon_sha256":"dedaa36634ae24e04df72f5bc3f2e2e98d800bd6b59a648645ebd76b9f1ac16e"},"schema_version":"1.0","source":{"id":"1802.02784","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.02784","created_at":"2026-05-18T00:17:23Z"},{"alias_kind":"arxiv_version","alias_value":"1802.02784v2","created_at":"2026-05-18T00:17:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.02784","created_at":"2026-05-18T00:17:23Z"},{"alias_kind":"pith_short_12","alias_value":"UGIKXIKWZZOZ","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"UGIKXIKWZZOZIVF2","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"UGIKXIKW","created_at":"2026-05-18T12:32:56Z"}],"graph_snapshots":[{"event_id":"sha256:5b9012af3478ec131fe4b5e56bc4fdfdefa6754f6387749b533518887d22861c","target":"graph","created_at":"2026-05-18T00:17:23Z","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":"High index optical waveguide devices such as slab waveguides, strip waveguides and fibers play extremely important roles in a wide range of modern applications including telecommunications, sensing, lasing, interferometry, and resonant amplification. Yet, transposing these advantageous applications from optics to acoustics remains a fundamental practical challenge, since most materials exhibit refractive indices lower than that of air for sound waves. Here, we demonstrate the relevance of acoustic metamaterials for tackling this pivotal problem. More specifically, we consider a metamaterial bu","authors_text":"Farzad Zangeneh-Nejad, Romain Fleury","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-02-08T10:22:48Z","title":"Acoustic Analogues of High-Index Optical Waveguide Devices"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.02784","kind":"arxiv","version":2},"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":"sha256:4850107a3bbd76f7750107b7f1c6a2677ee528b67f5495c1e8e0f1f7896cec2e","target":"record","created_at":"2026-05-18T00:17:23Z","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":"3613cd9c7d6c1474becb616681527dc4ce354ed789abb7a105c3da83b6400cf2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-02-08T10:22:48Z","title_canon_sha256":"dedaa36634ae24e04df72f5bc3f2e2e98d800bd6b59a648645ebd76b9f1ac16e"},"schema_version":"1.0","source":{"id":"1802.02784","kind":"arxiv","version":2}},"canonical_sha256":"a190aba156ce5d9454ba4e09853a8091e305b3b83a7abeec06617642e5d3c730","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a190aba156ce5d9454ba4e09853a8091e305b3b83a7abeec06617642e5d3c730","first_computed_at":"2026-05-18T00:17:23.768668Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:17:23.768668Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/o0l9WYqWJhu0ubS4wjaZQhn3p7RwAJfCyCuAm8GK5x/viY1IafQyCufaydpbgr2MmRBjNWmHnO1E9XQo3jaBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:17:23.769222Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.02784","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4850107a3bbd76f7750107b7f1c6a2677ee528b67f5495c1e8e0f1f7896cec2e","sha256:5b9012af3478ec131fe4b5e56bc4fdfdefa6754f6387749b533518887d22861c"],"state_sha256":"e8aab47b79540320eab0ed4c544a69116e889aebb99b3e3a69325e13d5c19dd3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DALh2h9TDBmAPHccdTJR9ZlOF8la6KjmZ1ceWJVd+s0WHt4mcVLERootY7kZToIdIz1tQi+Ntb7k29yFavbOBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T04:55:37.667075Z","bundle_sha256":"baf87915dffdf39dd0dea007044f5425d741b9ea994762bc8b399a588094eeb6"}}