{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:AHAUB33ZDKQTCSRP3NTOVF4N52","short_pith_number":"pith:AHAUB33Z","canonical_record":{"source":{"id":"2212.07813","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-12-15T13:30:20Z","cross_cats_sorted":[],"title_canon_sha256":"2a0e8ad62f6009fc22d734eadecbe3bc04f77bc2410cabb3e381b14a8a799cba","abstract_canon_sha256":"3db9906caf1625888b2deec1e1e9d1a3fc1a5664dd01b56c07f990736e724e3d"},"schema_version":"1.0"},"canonical_sha256":"01c140ef791aa1314a2fdb66ea978deea1e3f99faa438ba04a7fd8fe585b2f5b","source":{"kind":"arxiv","id":"2212.07813","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2212.07813","created_at":"2026-07-05T05:25:38Z"},{"alias_kind":"arxiv_version","alias_value":"2212.07813v1","created_at":"2026-07-05T05:25:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2212.07813","created_at":"2026-07-05T05:25:38Z"},{"alias_kind":"pith_short_12","alias_value":"AHAUB33ZDKQT","created_at":"2026-07-05T05:25:38Z"},{"alias_kind":"pith_short_16","alias_value":"AHAUB33ZDKQTCSRP","created_at":"2026-07-05T05:25:38Z"},{"alias_kind":"pith_short_8","alias_value":"AHAUB33Z","created_at":"2026-07-05T05:25:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:AHAUB33ZDKQTCSRP3NTOVF4N52","target":"record","payload":{"canonical_record":{"source":{"id":"2212.07813","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-12-15T13:30:20Z","cross_cats_sorted":[],"title_canon_sha256":"2a0e8ad62f6009fc22d734eadecbe3bc04f77bc2410cabb3e381b14a8a799cba","abstract_canon_sha256":"3db9906caf1625888b2deec1e1e9d1a3fc1a5664dd01b56c07f990736e724e3d"},"schema_version":"1.0"},"canonical_sha256":"01c140ef791aa1314a2fdb66ea978deea1e3f99faa438ba04a7fd8fe585b2f5b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:25:38.035690Z","signature_b64":"CA1TOnWRaHMcL28aSmJFqMgxKourQr4XSdGXTMZ2+nG/P8z9zGvbZmWb2wVSPSa6RV026n8EJ46gss7N2MfJAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"01c140ef791aa1314a2fdb66ea978deea1e3f99faa438ba04a7fd8fe585b2f5b","last_reissued_at":"2026-07-05T05:25:38.035201Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:25:38.035201Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2212.07813","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:25:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7B1d2URqTYzNm8gQAKzNbLQ7HPX/5GaS/WWkddjnnuGfkwN+bOFc296XVDnfl3Z1c4dHnU2dWPPm7g4aCjXOCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T02:36:05.844570Z"},"content_sha256":"752e5f93ccdc8c7bc02d568443c46acb1d1f62fdd863c82f8036097150500440","schema_version":"1.0","event_id":"sha256:752e5f93ccdc8c7bc02d568443c46acb1d1f62fdd863c82f8036097150500440"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:AHAUB33ZDKQTCSRP3NTOVF4N52","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Angle-insensitive spectral imaging based on topology-optimized plasmonic metasurfaces","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Fang Liu, Jiawei Yang, Kaiyu Cui, Wei Zhang, Xue Feng, Yidong Huang","submitted_at":"2022-12-15T13:30:20Z","abstract_excerpt":"On-chip spectral imaging based on engineered spectral modulation and computational spectral reconstruction provides a promising scheme for portable spectral cameras. However, the angle dependence of modulation units results in the angle sensitivity of spectral imaging, which limits its practical applications. Here, we proposed a design for angle-robust spectral recovery based on a group of topology-optimized plasmonic metasurface units under a 30{\\deg} field-of-view, and demonstrate angle-insensitive on-chip spectral imaging in the wavelength range of 450 to 750 nm for average polarization. Fu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2212.07813","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/2212.07813/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":"2026-07-05T05:25:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GHaaRxZTuXPA+M9ZXsS205E+I3mtYLH7r31zFHI0XILKVPcXrrcW4O+O/O0rU/7gLETyBjnj9aTBnL40WM4iAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T02:36:05.845108Z"},"content_sha256":"c2073eb6757ee7c73e3696701afd469338891474b4464795ef52777dc52d0cb0","schema_version":"1.0","event_id":"sha256:c2073eb6757ee7c73e3696701afd469338891474b4464795ef52777dc52d0cb0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AHAUB33ZDKQTCSRP3NTOVF4N52/bundle.json","state_url":"https://pith.science/pith/AHAUB33ZDKQTCSRP3NTOVF4N52/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AHAUB33ZDKQTCSRP3NTOVF4N52/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":"2026-08-08T02:36:05Z","links":{"resolver":"https://pith.science/pith/AHAUB33ZDKQTCSRP3NTOVF4N52","bundle":"https://pith.science/pith/AHAUB33ZDKQTCSRP3NTOVF4N52/bundle.json","state":"https://pith.science/pith/AHAUB33ZDKQTCSRP3NTOVF4N52/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AHAUB33ZDKQTCSRP3NTOVF4N52/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:AHAUB33ZDKQTCSRP3NTOVF4N52","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":"3db9906caf1625888b2deec1e1e9d1a3fc1a5664dd01b56c07f990736e724e3d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-12-15T13:30:20Z","title_canon_sha256":"2a0e8ad62f6009fc22d734eadecbe3bc04f77bc2410cabb3e381b14a8a799cba"},"schema_version":"1.0","source":{"id":"2212.07813","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2212.07813","created_at":"2026-07-05T05:25:38Z"},{"alias_kind":"arxiv_version","alias_value":"2212.07813v1","created_at":"2026-07-05T05:25:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2212.07813","created_at":"2026-07-05T05:25:38Z"},{"alias_kind":"pith_short_12","alias_value":"AHAUB33ZDKQT","created_at":"2026-07-05T05:25:38Z"},{"alias_kind":"pith_short_16","alias_value":"AHAUB33ZDKQTCSRP","created_at":"2026-07-05T05:25:38Z"},{"alias_kind":"pith_short_8","alias_value":"AHAUB33Z","created_at":"2026-07-05T05:25:38Z"}],"graph_snapshots":[{"event_id":"sha256:c2073eb6757ee7c73e3696701afd469338891474b4464795ef52777dc52d0cb0","target":"graph","created_at":"2026-07-05T05:25:38Z","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/2212.07813/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"On-chip spectral imaging based on engineered spectral modulation and computational spectral reconstruction provides a promising scheme for portable spectral cameras. However, the angle dependence of modulation units results in the angle sensitivity of spectral imaging, which limits its practical applications. Here, we proposed a design for angle-robust spectral recovery based on a group of topology-optimized plasmonic metasurface units under a 30{\\deg} field-of-view, and demonstrate angle-insensitive on-chip spectral imaging in the wavelength range of 450 to 750 nm for average polarization. Fu","authors_text":"Fang Liu, Jiawei Yang, Kaiyu Cui, Wei Zhang, Xue Feng, Yidong Huang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-12-15T13:30:20Z","title":"Angle-insensitive spectral imaging based on topology-optimized plasmonic metasurfaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2212.07813","kind":"arxiv","version":1},"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":"sha256:752e5f93ccdc8c7bc02d568443c46acb1d1f62fdd863c82f8036097150500440","target":"record","created_at":"2026-07-05T05:25:38Z","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":"3db9906caf1625888b2deec1e1e9d1a3fc1a5664dd01b56c07f990736e724e3d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-12-15T13:30:20Z","title_canon_sha256":"2a0e8ad62f6009fc22d734eadecbe3bc04f77bc2410cabb3e381b14a8a799cba"},"schema_version":"1.0","source":{"id":"2212.07813","kind":"arxiv","version":1}},"canonical_sha256":"01c140ef791aa1314a2fdb66ea978deea1e3f99faa438ba04a7fd8fe585b2f5b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"01c140ef791aa1314a2fdb66ea978deea1e3f99faa438ba04a7fd8fe585b2f5b","first_computed_at":"2026-07-05T05:25:38.035201Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:25:38.035201Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CA1TOnWRaHMcL28aSmJFqMgxKourQr4XSdGXTMZ2+nG/P8z9zGvbZmWb2wVSPSa6RV026n8EJ46gss7N2MfJAA==","signature_status":"signed_v1","signed_at":"2026-07-05T05:25:38.035690Z","signed_message":"canonical_sha256_bytes"},"source_id":"2212.07813","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:752e5f93ccdc8c7bc02d568443c46acb1d1f62fdd863c82f8036097150500440","sha256:c2073eb6757ee7c73e3696701afd469338891474b4464795ef52777dc52d0cb0"],"state_sha256":"3c4ea1fbd5be55ebe37abb1acd090deb213815c032396ed2e286459fb0661cac"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3rdRRzefc2nvJcIxymBn7s4wt5aZ+DspYoqK12cled6QYHk6zUTxijbDuumKR525W3xVmgBS3t3oxVinpXZIBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T02:36:05.848847Z","bundle_sha256":"8c89d551ce7b9eac36d25b0598dd037e36f1160eba918a2afbf8bf89cd07ec97"}}