{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:4ZYTREGM63XTGXBGLA7EG2WK6B","short_pith_number":"pith:4ZYTREGM","canonical_record":{"source":{"id":"1810.08158","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-10-18T16:53:48Z","cross_cats_sorted":[],"title_canon_sha256":"5534680e0c62b5b6f81b46547b9bba994995a1ec749caf4ab0f644aa42d41188","abstract_canon_sha256":"8f84c25912767da2a97302972b0ebc57ef71e52037e5a35175424a2259865186"},"schema_version":"1.0"},"canonical_sha256":"e6713890ccf6ef335c26583e436acaf04d33291b2f1a0fb335708b3fdcd44fae","source":{"kind":"arxiv","id":"1810.08158","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.08158","created_at":"2026-05-18T00:02:50Z"},{"alias_kind":"arxiv_version","alias_value":"1810.08158v1","created_at":"2026-05-18T00:02:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.08158","created_at":"2026-05-18T00:02:50Z"},{"alias_kind":"pith_short_12","alias_value":"4ZYTREGM63XT","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4ZYTREGM63XTGXBG","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4ZYTREGM","created_at":"2026-05-18T12:32:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:4ZYTREGM63XTGXBGLA7EG2WK6B","target":"record","payload":{"canonical_record":{"source":{"id":"1810.08158","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-10-18T16:53:48Z","cross_cats_sorted":[],"title_canon_sha256":"5534680e0c62b5b6f81b46547b9bba994995a1ec749caf4ab0f644aa42d41188","abstract_canon_sha256":"8f84c25912767da2a97302972b0ebc57ef71e52037e5a35175424a2259865186"},"schema_version":"1.0"},"canonical_sha256":"e6713890ccf6ef335c26583e436acaf04d33291b2f1a0fb335708b3fdcd44fae","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:02:50.423873Z","signature_b64":"CLlzfxZ2Ecj42qeYjmkOMLb1tvu1veqyA/M+hm5AMeomL7nm2LJgqpF+RTmids47pwnPvPmoRJpN72ujLXzcBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e6713890ccf6ef335c26583e436acaf04d33291b2f1a0fb335708b3fdcd44fae","last_reissued_at":"2026-05-18T00:02:50.423395Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:02:50.423395Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1810.08158","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":"2026-05-18T00:02:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wq/YLL8oP0+LTp13IRy27zW6bx9cV5Zh4n/6t23h20v7+e4HXHqF/4DMlz/p+0AEMhLa0KM6cxi6FyKguHEsBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T13:05:25.257567Z"},"content_sha256":"0e5efba2ffc7b145910c7118c38d075defa1f7b09b3833264992d0048f1c17ff","schema_version":"1.0","event_id":"sha256:0e5efba2ffc7b145910c7118c38d075defa1f7b09b3833264992d0048f1c17ff"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:4ZYTREGM63XTGXBGLA7EG2WK6B","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photonic potential for TM waves","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Alessandro Alberucci, Chandroth P. Jisha, Stefan Nolte","submitted_at":"2018-10-18T16:53:48Z","abstract_excerpt":"We discuss the effective photonic potential for TM waves in inhomogeneous isotropic media. The model provides an easy and intuitive comprehension of form birefringence, paving the way for a new approach on the design of graded-index optical waveguides on nanometric scales. We investigate the application to nanophotonic devices, including integrated nanoscale wave plates and slot waveguides."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.08158","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":"2026-05-18T00:02:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WnbMGjmp5kLNAmplKkJw0PYIl3+9cpQLJlCCAOlXD9W35eqQvZtnPQsCdw13Y2tjd0ZkXcnAPapUOM7SCDoYBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T13:05:25.257911Z"},"content_sha256":"3000c8c478b9a47501e5bdddf787c7dfdf79c87cb2a61b71eb86b93637fbd88c","schema_version":"1.0","event_id":"sha256:3000c8c478b9a47501e5bdddf787c7dfdf79c87cb2a61b71eb86b93637fbd88c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4ZYTREGM63XTGXBGLA7EG2WK6B/bundle.json","state_url":"https://pith.science/pith/4ZYTREGM63XTGXBGLA7EG2WK6B/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4ZYTREGM63XTGXBGLA7EG2WK6B/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":"2026-06-26T13:05:25Z","links":{"resolver":"https://pith.science/pith/4ZYTREGM63XTGXBGLA7EG2WK6B","bundle":"https://pith.science/pith/4ZYTREGM63XTGXBGLA7EG2WK6B/bundle.json","state":"https://pith.science/pith/4ZYTREGM63XTGXBGLA7EG2WK6B/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4ZYTREGM63XTGXBGLA7EG2WK6B/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4ZYTREGM63XTGXBGLA7EG2WK6B","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":"8f84c25912767da2a97302972b0ebc57ef71e52037e5a35175424a2259865186","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-10-18T16:53:48Z","title_canon_sha256":"5534680e0c62b5b6f81b46547b9bba994995a1ec749caf4ab0f644aa42d41188"},"schema_version":"1.0","source":{"id":"1810.08158","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.08158","created_at":"2026-05-18T00:02:50Z"},{"alias_kind":"arxiv_version","alias_value":"1810.08158v1","created_at":"2026-05-18T00:02:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.08158","created_at":"2026-05-18T00:02:50Z"},{"alias_kind":"pith_short_12","alias_value":"4ZYTREGM63XT","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4ZYTREGM63XTGXBG","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4ZYTREGM","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:3000c8c478b9a47501e5bdddf787c7dfdf79c87cb2a61b71eb86b93637fbd88c","target":"graph","created_at":"2026-05-18T00:02:50Z","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 discuss the effective photonic potential for TM waves in inhomogeneous isotropic media. The model provides an easy and intuitive comprehension of form birefringence, paving the way for a new approach on the design of graded-index optical waveguides on nanometric scales. We investigate the application to nanophotonic devices, including integrated nanoscale wave plates and slot waveguides.","authors_text":"Alessandro Alberucci, Chandroth P. Jisha, Stefan Nolte","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-10-18T16:53:48Z","title":"Photonic potential for TM waves"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.08158","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":"sha256:0e5efba2ffc7b145910c7118c38d075defa1f7b09b3833264992d0048f1c17ff","target":"record","created_at":"2026-05-18T00:02:50Z","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":"8f84c25912767da2a97302972b0ebc57ef71e52037e5a35175424a2259865186","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2018-10-18T16:53:48Z","title_canon_sha256":"5534680e0c62b5b6f81b46547b9bba994995a1ec749caf4ab0f644aa42d41188"},"schema_version":"1.0","source":{"id":"1810.08158","kind":"arxiv","version":1}},"canonical_sha256":"e6713890ccf6ef335c26583e436acaf04d33291b2f1a0fb335708b3fdcd44fae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e6713890ccf6ef335c26583e436acaf04d33291b2f1a0fb335708b3fdcd44fae","first_computed_at":"2026-05-18T00:02:50.423395Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:02:50.423395Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CLlzfxZ2Ecj42qeYjmkOMLb1tvu1veqyA/M+hm5AMeomL7nm2LJgqpF+RTmids47pwnPvPmoRJpN72ujLXzcBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:02:50.423873Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.08158","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0e5efba2ffc7b145910c7118c38d075defa1f7b09b3833264992d0048f1c17ff","sha256:3000c8c478b9a47501e5bdddf787c7dfdf79c87cb2a61b71eb86b93637fbd88c"],"state_sha256":"f04325acf66ded26b0d85646d3527c7ca407898f3e2a89a687068d8057bfea72"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5WRZjrj6BOBBTAyMh9TlrdNaDo3zL+DNqal7P3RHen0cZeFz25oFtobKabkR9JZilspziPMdBJu49ZVNgGTaDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T13:05:25.259808Z","bundle_sha256":"5dbdd9c0d2cc5766a8c060bdc5932b9aad127611827e8683dc5ea79a65d70d66"}}