{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:5FE7BM2KQPE2TYRILQUUMQK4NE","short_pith_number":"pith:5FE7BM2K","canonical_record":{"source":{"id":"2105.06703","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-05-14T08:29:07Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"5b2ea4c69d62c8bff52879564b7b55b8171d632783bf62cde146dd0d89f6c073","abstract_canon_sha256":"f66a41e4d7cc1061006987fa602ab5cef199486faa18b6896e0fdb39e4f1ddf0"},"schema_version":"1.0"},"canonical_sha256":"e949f0b34a83c9a9e2285c2946415c691a791083e4011fdfbd4c663c751ec024","source":{"kind":"arxiv","id":"2105.06703","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.06703","created_at":"2026-07-05T02:41:51Z"},{"alias_kind":"arxiv_version","alias_value":"2105.06703v2","created_at":"2026-07-05T02:41:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.06703","created_at":"2026-07-05T02:41:51Z"},{"alias_kind":"pith_short_12","alias_value":"5FE7BM2KQPE2","created_at":"2026-07-05T02:41:51Z"},{"alias_kind":"pith_short_16","alias_value":"5FE7BM2KQPE2TYRI","created_at":"2026-07-05T02:41:51Z"},{"alias_kind":"pith_short_8","alias_value":"5FE7BM2K","created_at":"2026-07-05T02:41:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:5FE7BM2KQPE2TYRILQUUMQK4NE","target":"record","payload":{"canonical_record":{"source":{"id":"2105.06703","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-05-14T08:29:07Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"5b2ea4c69d62c8bff52879564b7b55b8171d632783bf62cde146dd0d89f6c073","abstract_canon_sha256":"f66a41e4d7cc1061006987fa602ab5cef199486faa18b6896e0fdb39e4f1ddf0"},"schema_version":"1.0"},"canonical_sha256":"e949f0b34a83c9a9e2285c2946415c691a791083e4011fdfbd4c663c751ec024","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:41:51.278085Z","signature_b64":"DpdfD8JSCTyqVIsENYWiXYygW9L+GbTQL78vIDJ5uLFi7h9vURsqUkv4uEbdwwVmWzuJ85sG+nXPq0TspBjoBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e949f0b34a83c9a9e2285c2946415c691a791083e4011fdfbd4c663c751ec024","last_reissued_at":"2026-07-05T02:41:51.277699Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:41:51.277699Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2105.06703","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":"2026-07-05T02:41:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x9NwpYSE6Jlibmxn5Ti9jpyMJ1fBpSQj+NlmI9KrkHO5kzGCIzw60Yem41wtoL60+stZuZ+q/FHNjlkUJ30+CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T03:11:44.721575Z"},"content_sha256":"2a92407dfe5962175d1098c0cbb2aa215e519de16643e7f23b385f1a4d61cd91","schema_version":"1.0","event_id":"sha256:2a92407dfe5962175d1098c0cbb2aa215e519de16643e7f23b385f1a4d61cd91"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:5FE7BM2KQPE2TYRILQUUMQK4NE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Substrate matters: Surface-polariton enhanced infrared nanospectroscopy of molecular vibrations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.app-ph"],"primary_cat":"physics.optics","authors_text":"Lars Mester, Marta Autore, Monika Goikoetxea, R. Hillenbrand","submitted_at":"2021-05-14T08:29:07Z","abstract_excerpt":"Infrared nanospectroscopy based on Fourier transform infrared near-field spectroscopy (nano-FTIR) is an emerging nanoanalytical tool with large application potential for label-free mapping and identification of organic and inorganic materials with nanoscale spatial resolution. However, the detection of thin molecular layers and nanostructures on standard substrates is still challenged by weak signals. Here, we demonstrate a significant enhancement of nano-FTIR signals of a thin organic layer by exploiting polariton-resonant tip-substrate coupling and surface polariton illumination of the probi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.06703","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/2105.06703/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":"2026-07-05T02:41:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8YcqEd/ksJJR0HOgmbTr5xOgusCOGinlhbylt7gjkQqFeAOqf6Y0Mle6X8bFbCp37YyRjLwhcQnHIhdcdAjHDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T03:11:44.721952Z"},"content_sha256":"836f6d923ef41246e30786a30d72626b5333a8ae12e6dd09646cc0d27c71b939","schema_version":"1.0","event_id":"sha256:836f6d923ef41246e30786a30d72626b5333a8ae12e6dd09646cc0d27c71b939"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5FE7BM2KQPE2TYRILQUUMQK4NE/bundle.json","state_url":"https://pith.science/pith/5FE7BM2KQPE2TYRILQUUMQK4NE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5FE7BM2KQPE2TYRILQUUMQK4NE/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":"2026-08-05T03:11:44Z","links":{"resolver":"https://pith.science/pith/5FE7BM2KQPE2TYRILQUUMQK4NE","bundle":"https://pith.science/pith/5FE7BM2KQPE2TYRILQUUMQK4NE/bundle.json","state":"https://pith.science/pith/5FE7BM2KQPE2TYRILQUUMQK4NE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5FE7BM2KQPE2TYRILQUUMQK4NE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:5FE7BM2KQPE2TYRILQUUMQK4NE","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":"f66a41e4d7cc1061006987fa602ab5cef199486faa18b6896e0fdb39e4f1ddf0","cross_cats_sorted":["physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-05-14T08:29:07Z","title_canon_sha256":"5b2ea4c69d62c8bff52879564b7b55b8171d632783bf62cde146dd0d89f6c073"},"schema_version":"1.0","source":{"id":"2105.06703","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.06703","created_at":"2026-07-05T02:41:51Z"},{"alias_kind":"arxiv_version","alias_value":"2105.06703v2","created_at":"2026-07-05T02:41:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.06703","created_at":"2026-07-05T02:41:51Z"},{"alias_kind":"pith_short_12","alias_value":"5FE7BM2KQPE2","created_at":"2026-07-05T02:41:51Z"},{"alias_kind":"pith_short_16","alias_value":"5FE7BM2KQPE2TYRI","created_at":"2026-07-05T02:41:51Z"},{"alias_kind":"pith_short_8","alias_value":"5FE7BM2K","created_at":"2026-07-05T02:41:51Z"}],"graph_snapshots":[{"event_id":"sha256:836f6d923ef41246e30786a30d72626b5333a8ae12e6dd09646cc0d27c71b939","target":"graph","created_at":"2026-07-05T02:41:51Z","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/2105.06703/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Infrared nanospectroscopy based on Fourier transform infrared near-field spectroscopy (nano-FTIR) is an emerging nanoanalytical tool with large application potential for label-free mapping and identification of organic and inorganic materials with nanoscale spatial resolution. However, the detection of thin molecular layers and nanostructures on standard substrates is still challenged by weak signals. Here, we demonstrate a significant enhancement of nano-FTIR signals of a thin organic layer by exploiting polariton-resonant tip-substrate coupling and surface polariton illumination of the probi","authors_text":"Lars Mester, Marta Autore, Monika Goikoetxea, R. Hillenbrand","cross_cats":["physics.app-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-05-14T08:29:07Z","title":"Substrate matters: Surface-polariton enhanced infrared nanospectroscopy of molecular vibrations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.06703","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":"sha256:2a92407dfe5962175d1098c0cbb2aa215e519de16643e7f23b385f1a4d61cd91","target":"record","created_at":"2026-07-05T02:41:51Z","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":"f66a41e4d7cc1061006987fa602ab5cef199486faa18b6896e0fdb39e4f1ddf0","cross_cats_sorted":["physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-05-14T08:29:07Z","title_canon_sha256":"5b2ea4c69d62c8bff52879564b7b55b8171d632783bf62cde146dd0d89f6c073"},"schema_version":"1.0","source":{"id":"2105.06703","kind":"arxiv","version":2}},"canonical_sha256":"e949f0b34a83c9a9e2285c2946415c691a791083e4011fdfbd4c663c751ec024","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e949f0b34a83c9a9e2285c2946415c691a791083e4011fdfbd4c663c751ec024","first_computed_at":"2026-07-05T02:41:51.277699Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:41:51.277699Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DpdfD8JSCTyqVIsENYWiXYygW9L+GbTQL78vIDJ5uLFi7h9vURsqUkv4uEbdwwVmWzuJ85sG+nXPq0TspBjoBw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:41:51.278085Z","signed_message":"canonical_sha256_bytes"},"source_id":"2105.06703","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a92407dfe5962175d1098c0cbb2aa215e519de16643e7f23b385f1a4d61cd91","sha256:836f6d923ef41246e30786a30d72626b5333a8ae12e6dd09646cc0d27c71b939"],"state_sha256":"ece780fe40dbf92b21f2c1269dee1bde87115f49da1827a84ebf31ca4b833307"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ah6FvM50cR3DDBFP6NkgzuvucH6EyPPQsOBYAJXPBlG++sbB0Km26bU7/BshLAuGtYlrDN1bChN+JQYb8AlBCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T03:11:44.724436Z","bundle_sha256":"ed9cc58169533ed5075b5bba703262105bc5064fe6d840750c5dcda66fd05318"}}