{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:PCQREBHOHQTFY25DJBPEUGWNDK","short_pith_number":"pith:PCQREBHO","schema_version":"1.0","canonical_sha256":"78a11204ee3c265c6ba3485e4a1acd1a8f6e5d7324963a665578859b0396c1a3","source":{"kind":"arxiv","id":"2608.13548","version":1},"attestation_state":"computed","paper":{"title":"All-optical switching of nonlinear structured light in crystal-engineered van der Waals materials","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.optics","authors_text":"Benedikt Ursprung, Bianca Sanfilippo, Chiara Trovatello, Francesco Gucci, Giulio Cerullo, Luca Carletti, Marc Richstaetter, Paolo Valisa, P. James Schuck, Victoria Quiros-Cordero, Xiaoyang Zhu, Zhi Hao Peng","submitted_at":"2026-08-13T17:58:28Z","abstract_excerpt":"The orbital angular momentum (OAM) of light is a discrete, unbounded degree of freedom that underpins mode-multiplexed communications and high-dimensional quantum photonics. Yet, dynamic OAM control remains dependent on bulky free-space optics or cascaded architectures that separate switching from wavefront shaping, hindering nanoscale integration. Here, we engineer artificial van der Waals crystals from rhombohedrally stacked (3R) MoS$_2$, in which spatial control of the local crystal orientation imprints a nonlinear geometric phase onto the second-harmonic (SH) field, enabling background-fre"},"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":"2608.13548","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-08-13T17:58:28Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"62a322edbed1c4da27c244219f501dc3d3262e373ebfb679c0ea74ae3bb7b6bd","abstract_canon_sha256":"872ed0284cde431a09f15c0631fae9299f6e699c16e304195a37b9c90f46e955"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-14T01:25:02.721984Z","signature_b64":"VwbSVJtNmztKtvDup3GUh3nHBsCFbX8ajcnNqNwKZRwm2DumAHfUI55Y9iXX+t0ySvPMGyh2L71reG66KFRNCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"78a11204ee3c265c6ba3485e4a1acd1a8f6e5d7324963a665578859b0396c1a3","last_reissued_at":"2026-08-14T01:25:02.719713Z","signature_status":"signed_v1","first_computed_at":"2026-08-14T01:25:02.719713Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"All-optical switching of nonlinear structured light in crystal-engineered van der Waals materials","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.optics","authors_text":"Benedikt Ursprung, Bianca Sanfilippo, Chiara Trovatello, Francesco Gucci, Giulio Cerullo, Luca Carletti, Marc Richstaetter, Paolo Valisa, P. James Schuck, Victoria Quiros-Cordero, Xiaoyang Zhu, Zhi Hao Peng","submitted_at":"2026-08-13T17:58:28Z","abstract_excerpt":"The orbital angular momentum (OAM) of light is a discrete, unbounded degree of freedom that underpins mode-multiplexed communications and high-dimensional quantum photonics. Yet, dynamic OAM control remains dependent on bulky free-space optics or cascaded architectures that separate switching from wavefront shaping, hindering nanoscale integration. Here, we engineer artificial van der Waals crystals from rhombohedrally stacked (3R) MoS$_2$, in which spatial control of the local crystal orientation imprints a nonlinear geometric phase onto the second-harmonic (SH) field, enabling background-fre"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.13548","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/2608.13548/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":"2608.13548","created_at":"2026-08-14T01:25:02.721268+00:00"},{"alias_kind":"arxiv_version","alias_value":"2608.13548v1","created_at":"2026-08-14T01:25:02.721268+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.13548","created_at":"2026-08-14T01:25:02.721268+00:00"},{"alias_kind":"pith_short_12","alias_value":"PCQREBHOHQTF","created_at":"2026-08-14T01:25:02.721268+00:00"},{"alias_kind":"pith_short_16","alias_value":"PCQREBHOHQTFY25D","created_at":"2026-08-14T01:25:02.721268+00:00"},{"alias_kind":"pith_short_8","alias_value":"PCQREBHO","created_at":"2026-08-14T01:25:02.721268+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/PCQREBHOHQTFY25DJBPEUGWNDK","json":"https://pith.science/pith/PCQREBHOHQTFY25DJBPEUGWNDK.json","graph_json":"https://pith.science/api/pith-number/PCQREBHOHQTFY25DJBPEUGWNDK/graph.json","events_json":"https://pith.science/api/pith-number/PCQREBHOHQTFY25DJBPEUGWNDK/events.json","paper":"https://pith.science/paper/PCQREBHO"},"agent_actions":{"view_html":"https://pith.science/pith/PCQREBHOHQTFY25DJBPEUGWNDK","download_json":"https://pith.science/pith/PCQREBHOHQTFY25DJBPEUGWNDK.json","view_paper":"https://pith.science/paper/PCQREBHO","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2608.13548&json=true","fetch_graph":"https://pith.science/api/pith-number/PCQREBHOHQTFY25DJBPEUGWNDK/graph.json","fetch_events":"https://pith.science/api/pith-number/PCQREBHOHQTFY25DJBPEUGWNDK/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/PCQREBHOHQTFY25DJBPEUGWNDK/action/timestamp_anchor","attest_storage":"https://pith.science/pith/PCQREBHOHQTFY25DJBPEUGWNDK/action/storage_attestation","attest_author":"https://pith.science/pith/PCQREBHOHQTFY25DJBPEUGWNDK/action/author_attestation","sign_citation":"https://pith.science/pith/PCQREBHOHQTFY25DJBPEUGWNDK/action/citation_signature","submit_replication":"https://pith.science/pith/PCQREBHOHQTFY25DJBPEUGWNDK/action/replication_record"}},"created_at":"2026-08-14T01:25:02.721268+00:00","updated_at":"2026-08-14T01:25:02.721268+00:00"}