{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:SCUKAJ75LP3T4ERM62ZXSCTWQ3","short_pith_number":"pith:SCUKAJ75","schema_version":"1.0","canonical_sha256":"90a8a027fd5bf73e122cf6b3790a7686f01c19d2998ee1969a48fdc5d0c446f5","source":{"kind":"arxiv","id":"2507.15018","version":1},"attestation_state":"computed","paper":{"title":"A focusing optical phased array for tissue interrogation with side-lobe suppression and simplified beam steering","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Alireza Tabatabaei Mashayekh, Alvaro Moscoso M\\'artir, Florian Merget, Jeremy Witzens, Pedram Hosseini, Prachi Agrawal, Rebecca Rodrigo, Sandra Johnen, Yuntian Ding","submitted_at":"2025-07-20T16:02:32Z","abstract_excerpt":"We implement an integrated multi-electrode array on a silicon-nitride-based photonic integrated circuit for ex-vivo retinal characterization via optical stimulation. The interrogation beam formers, based on curved grating emitters and optical phased arrays, are designed to achieve transverse focusing with spot sizes in the 1 - 2 $\\mu$m range to target single cells. The experimentally realized focusing optical phased arrays show suppressed side-lobes, with approximately 11.5% of the power in each side-lobe and ~60% in the main lobe, reducing unintentional cellular excitation. Additional design "},"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":"2507.15018","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2025-07-20T16:02:32Z","cross_cats_sorted":[],"title_canon_sha256":"ded212177f616b5dfa76245d998037ff4ae618a0933f61db05cc00f3c38ff0f5","abstract_canon_sha256":"5aee1ccdac82d98a7a9ac07ec9136265dca547fe8ae572b4d0cb49d317dec1fe"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:40:16.803890Z","signature_b64":"JQPh34+eDMhFe0KQ3n6cpBogjx7NkeTJ6CmG7rh/Zsw+V+0NyWjZ4YzTddbIJaQfKGLG+LDvOvIJSRkXkgN8CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"90a8a027fd5bf73e122cf6b3790a7686f01c19d2998ee1969a48fdc5d0c446f5","last_reissued_at":"2026-07-05T11:40:16.803307Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:40:16.803307Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A focusing optical phased array for tissue interrogation with side-lobe suppression and simplified beam steering","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Alireza Tabatabaei Mashayekh, Alvaro Moscoso M\\'artir, Florian Merget, Jeremy Witzens, Pedram Hosseini, Prachi Agrawal, Rebecca Rodrigo, Sandra Johnen, Yuntian Ding","submitted_at":"2025-07-20T16:02:32Z","abstract_excerpt":"We implement an integrated multi-electrode array on a silicon-nitride-based photonic integrated circuit for ex-vivo retinal characterization via optical stimulation. The interrogation beam formers, based on curved grating emitters and optical phased arrays, are designed to achieve transverse focusing with spot sizes in the 1 - 2 $\\mu$m range to target single cells. The experimentally realized focusing optical phased arrays show suppressed side-lobes, with approximately 11.5% of the power in each side-lobe and ~60% in the main lobe, reducing unintentional cellular excitation. Additional design "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.15018","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2507.15018/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":"2507.15018","created_at":"2026-07-05T11:40:16.803377+00:00"},{"alias_kind":"arxiv_version","alias_value":"2507.15018v1","created_at":"2026-07-05T11:40:16.803377+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.15018","created_at":"2026-07-05T11:40:16.803377+00:00"},{"alias_kind":"pith_short_12","alias_value":"SCUKAJ75LP3T","created_at":"2026-07-05T11:40:16.803377+00:00"},{"alias_kind":"pith_short_16","alias_value":"SCUKAJ75LP3T4ERM","created_at":"2026-07-05T11:40:16.803377+00:00"},{"alias_kind":"pith_short_8","alias_value":"SCUKAJ75","created_at":"2026-07-05T11:40:16.803377+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/SCUKAJ75LP3T4ERM62ZXSCTWQ3","json":"https://pith.science/pith/SCUKAJ75LP3T4ERM62ZXSCTWQ3.json","graph_json":"https://pith.science/api/pith-number/SCUKAJ75LP3T4ERM62ZXSCTWQ3/graph.json","events_json":"https://pith.science/api/pith-number/SCUKAJ75LP3T4ERM62ZXSCTWQ3/events.json","paper":"https://pith.science/paper/SCUKAJ75"},"agent_actions":{"view_html":"https://pith.science/pith/SCUKAJ75LP3T4ERM62ZXSCTWQ3","download_json":"https://pith.science/pith/SCUKAJ75LP3T4ERM62ZXSCTWQ3.json","view_paper":"https://pith.science/paper/SCUKAJ75","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2507.15018&json=true","fetch_graph":"https://pith.science/api/pith-number/SCUKAJ75LP3T4ERM62ZXSCTWQ3/graph.json","fetch_events":"https://pith.science/api/pith-number/SCUKAJ75LP3T4ERM62ZXSCTWQ3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SCUKAJ75LP3T4ERM62ZXSCTWQ3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SCUKAJ75LP3T4ERM62ZXSCTWQ3/action/storage_attestation","attest_author":"https://pith.science/pith/SCUKAJ75LP3T4ERM62ZXSCTWQ3/action/author_attestation","sign_citation":"https://pith.science/pith/SCUKAJ75LP3T4ERM62ZXSCTWQ3/action/citation_signature","submit_replication":"https://pith.science/pith/SCUKAJ75LP3T4ERM62ZXSCTWQ3/action/replication_record"}},"created_at":"2026-07-05T11:40:16.803377+00:00","updated_at":"2026-07-05T11:40:16.803377+00:00"}