{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:2F5SGOJHS7PUEOSLRBHAVM2MJE","short_pith_number":"pith:2F5SGOJH","schema_version":"1.0","canonical_sha256":"d17b23392797df423a4b884e0ab34c4917fd6291cb78683cc6b89ee1c2bbd80b","source":{"kind":"arxiv","id":"2501.11920","version":2},"attestation_state":"computed","paper":{"title":"Nonreciprocal metasurfaces with epsilon-near-zero materials","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.app-ph"],"primary_cat":"physics.optics","authors_text":"Aditya Tripathi, Albert Mathew, Basudeb Sain, Piyush Jangid, Rebecca Aschwanden, Sergey Kruk, Thomas Zentgraf","submitted_at":"2025-01-21T06:48:18Z","abstract_excerpt":"Nonreciprocal optics enables asymmetric transmission of light when its sources and detectors are exchanged. A canonical example -- optical isolator -- enables light propagation in only one direction, similar to how electrical diodes enable unidirectional flow of electric current. Nonreciprocal optics today, unlike nonreciprocal electronics, remains bulky. Recently, nonlinear metasurfaces opened up a pathway to strong optical nonreciprocity at the nanoscale. However, demonstrations to date were based on optically slow nonlinearities involving thermal effects or phase transition materials. In th"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2501.11920","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2025-01-21T06:48:18Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"da1b7ebbea6cff5acba9c798c10f436002c4d7333862b827e97b89d110ef8816","abstract_canon_sha256":"7f4493034ba908dccb0fa2b2f5fdb1a583a47e0c96cab62f1921758bfac583eb"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:04:22.983506Z","signature_b64":"rytb/0NQSReTCDXVgiraZGq8bAlhIZ1UaraQntSXlnaTboVXlgAjLfKL0inZD8+Py39zXJOoVni91RsPZP6CDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d17b23392797df423a4b884e0ab34c4917fd6291cb78683cc6b89ee1c2bbd80b","last_reissued_at":"2026-07-05T10:04:22.982994Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:04:22.982994Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Nonreciprocal metasurfaces with epsilon-near-zero materials","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.app-ph"],"primary_cat":"physics.optics","authors_text":"Aditya Tripathi, Albert Mathew, Basudeb Sain, Piyush Jangid, Rebecca Aschwanden, Sergey Kruk, Thomas Zentgraf","submitted_at":"2025-01-21T06:48:18Z","abstract_excerpt":"Nonreciprocal optics enables asymmetric transmission of light when its sources and detectors are exchanged. A canonical example -- optical isolator -- enables light propagation in only one direction, similar to how electrical diodes enable unidirectional flow of electric current. Nonreciprocal optics today, unlike nonreciprocal electronics, remains bulky. Recently, nonlinear metasurfaces opened up a pathway to strong optical nonreciprocity at the nanoscale. However, demonstrations to date were based on optically slow nonlinearities involving thermal effects or phase transition materials. In th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.11920","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2501.11920/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2501.11920","created_at":"2026-07-05T10:04:22.983054+00:00"},{"alias_kind":"arxiv_version","alias_value":"2501.11920v2","created_at":"2026-07-05T10:04:22.983054+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.11920","created_at":"2026-07-05T10:04:22.983054+00:00"},{"alias_kind":"pith_short_12","alias_value":"2F5SGOJHS7PU","created_at":"2026-07-05T10:04:22.983054+00:00"},{"alias_kind":"pith_short_16","alias_value":"2F5SGOJHS7PUEOSL","created_at":"2026-07-05T10:04:22.983054+00:00"},{"alias_kind":"pith_short_8","alias_value":"2F5SGOJH","created_at":"2026-07-05T10:04:22.983054+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/2F5SGOJHS7PUEOSLRBHAVM2MJE","json":"https://pith.science/pith/2F5SGOJHS7PUEOSLRBHAVM2MJE.json","graph_json":"https://pith.science/api/pith-number/2F5SGOJHS7PUEOSLRBHAVM2MJE/graph.json","events_json":"https://pith.science/api/pith-number/2F5SGOJHS7PUEOSLRBHAVM2MJE/events.json","paper":"https://pith.science/paper/2F5SGOJH"},"agent_actions":{"view_html":"https://pith.science/pith/2F5SGOJHS7PUEOSLRBHAVM2MJE","download_json":"https://pith.science/pith/2F5SGOJHS7PUEOSLRBHAVM2MJE.json","view_paper":"https://pith.science/paper/2F5SGOJH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2501.11920&json=true","fetch_graph":"https://pith.science/api/pith-number/2F5SGOJHS7PUEOSLRBHAVM2MJE/graph.json","fetch_events":"https://pith.science/api/pith-number/2F5SGOJHS7PUEOSLRBHAVM2MJE/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2F5SGOJHS7PUEOSLRBHAVM2MJE/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2F5SGOJHS7PUEOSLRBHAVM2MJE/action/storage_attestation","attest_author":"https://pith.science/pith/2F5SGOJHS7PUEOSLRBHAVM2MJE/action/author_attestation","sign_citation":"https://pith.science/pith/2F5SGOJHS7PUEOSLRBHAVM2MJE/action/citation_signature","submit_replication":"https://pith.science/pith/2F5SGOJHS7PUEOSLRBHAVM2MJE/action/replication_record"}},"created_at":"2026-07-05T10:04:22.983054+00:00","updated_at":"2026-07-05T10:04:22.983054+00:00"}