{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:5FAYLCX5FQNF5VTDM52JWNCHIE","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":"1d7f93f3b6a6bab229e577ead39a8a0db26b511508e99b1bfa55bdf467e8097b","cross_cats_sorted":["physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-02-01T07:48:04Z","title_canon_sha256":"cb2987c4d127436613995c52ad1db5a9aa5b2904003b2b0f4e6157c8aae2324d"},"schema_version":"1.0","source":{"id":"2102.00681","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.00681","created_at":"2026-07-05T02:58:39Z"},{"alias_kind":"arxiv_version","alias_value":"2102.00681v2","created_at":"2026-07-05T02:58:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.00681","created_at":"2026-07-05T02:58:39Z"},{"alias_kind":"pith_short_12","alias_value":"5FAYLCX5FQNF","created_at":"2026-07-05T02:58:39Z"},{"alias_kind":"pith_short_16","alias_value":"5FAYLCX5FQNF5VTD","created_at":"2026-07-05T02:58:39Z"},{"alias_kind":"pith_short_8","alias_value":"5FAYLCX5","created_at":"2026-07-05T02:58:39Z"}],"graph_snapshots":[{"event_id":"sha256:b6db27d43f8d22d7bdf0592ec97f1be8f74da4589422192618aa5631f6530d4e","target":"graph","created_at":"2026-07-05T02:58:39Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2102.00681/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The ability of photonic crystal waveguides (PCWs) to confine and slow down light makes them an ideal component to enhance the performance of various photonic devices, such as optical modulators or sensors. However, the integration of PCWs in photonic applications poses design challenges, most notably, engineering the PCW mode dispersion and creating efficient coupling devices. Here, we solve these challenges with photonic inverse design, and experimentally demonstrate a slow-light PCW optical phased array (OPA) with a wide steering range. Even and odd mode PCWs are engineered for a group index","authors_text":"Dries Vercruysse, Jelena Vu\\v{c}kovi\\'c, Ki Youl Yang, Neil V. Sapra","cross_cats":["physics.app-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-02-01T07:48:04Z","title":"Inverse-Designed Photonic Crystal Circuits for Optical Beam Steering"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.00681","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":"sha256:81c75a51de59276de455a6f4f905d247aa3da82ad01eb749517d451560f7ff51","target":"record","created_at":"2026-07-05T02:58:39Z","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":"1d7f93f3b6a6bab229e577ead39a8a0db26b511508e99b1bfa55bdf467e8097b","cross_cats_sorted":["physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-02-01T07:48:04Z","title_canon_sha256":"cb2987c4d127436613995c52ad1db5a9aa5b2904003b2b0f4e6157c8aae2324d"},"schema_version":"1.0","source":{"id":"2102.00681","kind":"arxiv","version":2}},"canonical_sha256":"e941858afd2c1a5ed66367749b3447412f2265a308ebcba57d7e214927872026","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e941858afd2c1a5ed66367749b3447412f2265a308ebcba57d7e214927872026","first_computed_at":"2026-07-05T02:58:39.078649Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:58:39.078649Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oHitnqLOvvbhoAIJ6evELhHlZa6sB3DcHGnyg3AELdZn0zvbRc1GxyXVUHoq4L93Wrkm81RnQJ3oXGYM2QByCw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:58:39.079063Z","signed_message":"canonical_sha256_bytes"},"source_id":"2102.00681","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:81c75a51de59276de455a6f4f905d247aa3da82ad01eb749517d451560f7ff51","sha256:b6db27d43f8d22d7bdf0592ec97f1be8f74da4589422192618aa5631f6530d4e"],"state_sha256":"f84d9c6b74d7ceb3c6401e2e8ab586adbab836b47b74e059bce9a4748b4f7712"}