{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:X6RRIVWU3H2BLFR3RJJROE47K7","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":"78db650633ff867c6c87d6d5943b415cdbd24515fb9bba880e588d1f0a1b6bc3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"physics.optics","submitted_at":"2013-04-09T12:38:58Z","title_canon_sha256":"a6fdf89af032ab01625dc246c5faab9e721df47da62ef48a65e00115f8b36b5f"},"schema_version":"1.0","source":{"id":"1304.2556","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.2556","created_at":"2026-05-18T02:43:16Z"},{"alias_kind":"arxiv_version","alias_value":"1304.2556v2","created_at":"2026-05-18T02:43:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.2556","created_at":"2026-05-18T02:43:16Z"},{"alias_kind":"pith_short_12","alias_value":"X6RRIVWU3H2B","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_16","alias_value":"X6RRIVWU3H2BLFR3","created_at":"2026-05-18T12:28:06Z"},{"alias_kind":"pith_short_8","alias_value":"X6RRIVWU","created_at":"2026-05-18T12:28:06Z"}],"graph_snapshots":[{"event_id":"sha256:f6b10293368a3896b81a51ea8a8ddb68b6322c7f9e83ee387db2872a7114d7ad","target":"graph","created_at":"2026-05-18T02:43:16Z","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 report a simple, novel sub-diffraction method, i.e. diffraction interference induced super-focusing in second-harmonic (SH) Talbot effect, to achieve focusing size of less than {\\lambda}_pump/8 without involving evanescent waves or sub-wavelength apertures. By tailoring point spread functions with Fresnel diffraction interference, we observe periodic SH sub-diffracted spots over a hundred of micrometers away from the sample. Our demonstration is the first experimental realization of the proposal by Toraldo Di Francia pioneered 60 years ago for super-resolution imaging.","authors_text":"Dongmei Liu, Dunzhao Wei, Gang Zhao, Jianming Wen, Min Xiao, S. N. Zhu, Xiaopeng Hu, Yong Zhang, Zhenhua Chen","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"physics.optics","submitted_at":"2013-04-09T12:38:58Z","title":"Diffraction Interference Induced Superfocusing in Nonlinear Talbot Effect"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.2556","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":"sha256:72145e142d0e2ffe55cb4f32630bb12c13ab8ebf77af8f67eaa6b0a4cb5e401d","target":"record","created_at":"2026-05-18T02:43:16Z","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":"78db650633ff867c6c87d6d5943b415cdbd24515fb9bba880e588d1f0a1b6bc3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"physics.optics","submitted_at":"2013-04-09T12:38:58Z","title_canon_sha256":"a6fdf89af032ab01625dc246c5faab9e721df47da62ef48a65e00115f8b36b5f"},"schema_version":"1.0","source":{"id":"1304.2556","kind":"arxiv","version":2}},"canonical_sha256":"bfa31456d4d9f415963b8a5317139f57c45e940ae84997d8a109b96676849dee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bfa31456d4d9f415963b8a5317139f57c45e940ae84997d8a109b96676849dee","first_computed_at":"2026-05-18T02:43:16.583145Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:43:16.583145Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OZroD520JiZVZVKiqSK9bHhq6R8MEm9j1E+uwRu5a3thSS96ugfRv5T8gtO9kfPkrbxgWc73+8ZhdrvOjn+bBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:43:16.583786Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.2556","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:72145e142d0e2ffe55cb4f32630bb12c13ab8ebf77af8f67eaa6b0a4cb5e401d","sha256:f6b10293368a3896b81a51ea8a8ddb68b6322c7f9e83ee387db2872a7114d7ad"],"state_sha256":"f8f01ca000bef1e56b841bb5c6b6c6eb6070b07cc2c4347a1af7fb6b5f8c0abc"}