{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:NLUGIG4LW4NVKAU2VTPFQ4YJ4S","short_pith_number":"pith:NLUGIG4L","canonical_record":{"source":{"id":"2204.06191","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-04-13T06:39:41Z","cross_cats_sorted":[],"title_canon_sha256":"a42c9f3e267fb92443419c990cf5819696981984825b6e11c46c558045076115","abstract_canon_sha256":"819426c707ed3d42d23480514c7f296550649a623fa830caf4ffb552d2059a33"},"schema_version":"1.0"},"canonical_sha256":"6ae8641b8bb71b55029aacde587309e4a01a3bf1035830160cb6eb191c531cfe","source":{"kind":"arxiv","id":"2204.06191","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2204.06191","created_at":"2026-07-05T05:14:13Z"},{"alias_kind":"arxiv_version","alias_value":"2204.06191v2","created_at":"2026-07-05T05:14:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2204.06191","created_at":"2026-07-05T05:14:13Z"},{"alias_kind":"pith_short_12","alias_value":"NLUGIG4LW4NV","created_at":"2026-07-05T05:14:13Z"},{"alias_kind":"pith_short_16","alias_value":"NLUGIG4LW4NVKAU2","created_at":"2026-07-05T05:14:13Z"},{"alias_kind":"pith_short_8","alias_value":"NLUGIG4L","created_at":"2026-07-05T05:14:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:NLUGIG4LW4NVKAU2VTPFQ4YJ4S","target":"record","payload":{"canonical_record":{"source":{"id":"2204.06191","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-04-13T06:39:41Z","cross_cats_sorted":[],"title_canon_sha256":"a42c9f3e267fb92443419c990cf5819696981984825b6e11c46c558045076115","abstract_canon_sha256":"819426c707ed3d42d23480514c7f296550649a623fa830caf4ffb552d2059a33"},"schema_version":"1.0"},"canonical_sha256":"6ae8641b8bb71b55029aacde587309e4a01a3bf1035830160cb6eb191c531cfe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:14:13.281483Z","signature_b64":"f0UG36VeWPrpk3MZSYWLvlHY/c+Jcf46BKIzo6/gQkx7TjXawyQhIKoFHBvoG6gbAp4PDGLWEeRcAcOf1+40Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6ae8641b8bb71b55029aacde587309e4a01a3bf1035830160cb6eb191c531cfe","last_reissued_at":"2026-07-05T05:14:13.281040Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:14:13.281040Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2204.06191","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:14:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/nKPEjVf5uE9Y0esl70532DcsmmFSplX7t9ioho8LoxC3dClqeD3D7j5kbXzLZoJ77HzbMSsDsqcu6MKuuLTBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T20:56:04.456865Z"},"content_sha256":"d7e5c61f187693d8143187b98eff146654d028a3aa4227d68af5835d5e07a24d","schema_version":"1.0","event_id":"sha256:d7e5c61f187693d8143187b98eff146654d028a3aa4227d68af5835d5e07a24d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:NLUGIG4LW4NVKAU2VTPFQ4YJ4S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Full Geometric Control of Hidden Color Information in Diffraction Gratings under Angled White Light Illumination","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Cheng-Wei Qiu, Hailong Liu, Hao Wang, Hongtao Wang, Joel K.W. Yang, John You En Chan, Qifeng Ruan, Zhiyuan Yan","submitted_at":"2022-04-13T06:39:41Z","abstract_excerpt":"Under white light illumination, gratings produce an angular distribution of wavelengths dependent on the diffraction order and geometric parameters. However, previous studies of gratings are limited to at least one geometric parameter (height, periodicity, orientation, angle of incidence) kept constant. Here, we vary all geometric parameters in the gratings using a versatile nanofabrication technique, two-photon polymerization lithography, to encode hidden color information through 2 design approaches. The first approach hides color information by decoupling the effects of grating height and p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2204.06191","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/2204.06191/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:14:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mzW3LVDVlrhZKmh1WvjgpeS0UYYh3wZjd4QwOHiicroP+94rP2dKv8xTtaP4XRuxDXMsD7qqjtxnsR5qScXYAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T20:56:04.457236Z"},"content_sha256":"e0f9821548d93477208518017db1f1a642aa66d412c95228220f6f404727f664","schema_version":"1.0","event_id":"sha256:e0f9821548d93477208518017db1f1a642aa66d412c95228220f6f404727f664"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NLUGIG4LW4NVKAU2VTPFQ4YJ4S/bundle.json","state_url":"https://pith.science/pith/NLUGIG4LW4NVKAU2VTPFQ4YJ4S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NLUGIG4LW4NVKAU2VTPFQ4YJ4S/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-06T20:56:04Z","links":{"resolver":"https://pith.science/pith/NLUGIG4LW4NVKAU2VTPFQ4YJ4S","bundle":"https://pith.science/pith/NLUGIG4LW4NVKAU2VTPFQ4YJ4S/bundle.json","state":"https://pith.science/pith/NLUGIG4LW4NVKAU2VTPFQ4YJ4S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NLUGIG4LW4NVKAU2VTPFQ4YJ4S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:NLUGIG4LW4NVKAU2VTPFQ4YJ4S","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":"819426c707ed3d42d23480514c7f296550649a623fa830caf4ffb552d2059a33","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-04-13T06:39:41Z","title_canon_sha256":"a42c9f3e267fb92443419c990cf5819696981984825b6e11c46c558045076115"},"schema_version":"1.0","source":{"id":"2204.06191","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2204.06191","created_at":"2026-07-05T05:14:13Z"},{"alias_kind":"arxiv_version","alias_value":"2204.06191v2","created_at":"2026-07-05T05:14:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2204.06191","created_at":"2026-07-05T05:14:13Z"},{"alias_kind":"pith_short_12","alias_value":"NLUGIG4LW4NV","created_at":"2026-07-05T05:14:13Z"},{"alias_kind":"pith_short_16","alias_value":"NLUGIG4LW4NVKAU2","created_at":"2026-07-05T05:14:13Z"},{"alias_kind":"pith_short_8","alias_value":"NLUGIG4L","created_at":"2026-07-05T05:14:13Z"}],"graph_snapshots":[{"event_id":"sha256:e0f9821548d93477208518017db1f1a642aa66d412c95228220f6f404727f664","target":"graph","created_at":"2026-07-05T05:14:13Z","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/2204.06191/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Under white light illumination, gratings produce an angular distribution of wavelengths dependent on the diffraction order and geometric parameters. However, previous studies of gratings are limited to at least one geometric parameter (height, periodicity, orientation, angle of incidence) kept constant. Here, we vary all geometric parameters in the gratings using a versatile nanofabrication technique, two-photon polymerization lithography, to encode hidden color information through 2 design approaches. The first approach hides color information by decoupling the effects of grating height and p","authors_text":"Cheng-Wei Qiu, Hailong Liu, Hao Wang, Hongtao Wang, Joel K.W. Yang, John You En Chan, Qifeng Ruan, Zhiyuan Yan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-04-13T06:39:41Z","title":"Full Geometric Control of Hidden Color Information in Diffraction Gratings under Angled White Light Illumination"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2204.06191","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:d7e5c61f187693d8143187b98eff146654d028a3aa4227d68af5835d5e07a24d","target":"record","created_at":"2026-07-05T05:14:13Z","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":"819426c707ed3d42d23480514c7f296550649a623fa830caf4ffb552d2059a33","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-04-13T06:39:41Z","title_canon_sha256":"a42c9f3e267fb92443419c990cf5819696981984825b6e11c46c558045076115"},"schema_version":"1.0","source":{"id":"2204.06191","kind":"arxiv","version":2}},"canonical_sha256":"6ae8641b8bb71b55029aacde587309e4a01a3bf1035830160cb6eb191c531cfe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6ae8641b8bb71b55029aacde587309e4a01a3bf1035830160cb6eb191c531cfe","first_computed_at":"2026-07-05T05:14:13.281040Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:14:13.281040Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"f0UG36VeWPrpk3MZSYWLvlHY/c+Jcf46BKIzo6/gQkx7TjXawyQhIKoFHBvoG6gbAp4PDGLWEeRcAcOf1+40Ag==","signature_status":"signed_v1","signed_at":"2026-07-05T05:14:13.281483Z","signed_message":"canonical_sha256_bytes"},"source_id":"2204.06191","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d7e5c61f187693d8143187b98eff146654d028a3aa4227d68af5835d5e07a24d","sha256:e0f9821548d93477208518017db1f1a642aa66d412c95228220f6f404727f664"],"state_sha256":"393e7b9dd59a2802db2cd57405d33fdfdfda492ace08c3511458ef1fb27815bc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+eQgfhdle/3SZ7/fm+HrSu2yTm6HyNjjW0kpKzSA8fx0SqZC5o9YF6DZwAMtJYV4yZqUfx4OvLE/Lakq63U1BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T20:56:04.459219Z","bundle_sha256":"c8256541bf00807bf32b56687f2cbe808aff126e6c7abb3fd91e1aba7b91722c"}}