{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:5BXGVHSKGSDN436LJ3KWCBTTKM","short_pith_number":"pith:5BXGVHSK","canonical_record":{"source":{"id":"2112.08112","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2021-12-15T13:26:26Z","cross_cats_sorted":[],"title_canon_sha256":"f280bd7ca0b92b6b8918f77d59453f861030da0d5ff3641ceb6b074cedab815a","abstract_canon_sha256":"b86f14ae5e1b6ecf196ace09444f29863c536fc41852c8138cfcda6d7a6268a9"},"schema_version":"1.0"},"canonical_sha256":"e86e6a9e4a3486de6fcb4ed56106735326275a11ca6f2acd2e09ea994a484a15","source":{"kind":"arxiv","id":"2112.08112","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.08112","created_at":"2026-07-05T04:13:48Z"},{"alias_kind":"arxiv_version","alias_value":"2112.08112v1","created_at":"2026-07-05T04:13:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.08112","created_at":"2026-07-05T04:13:48Z"},{"alias_kind":"pith_short_12","alias_value":"5BXGVHSKGSDN","created_at":"2026-07-05T04:13:48Z"},{"alias_kind":"pith_short_16","alias_value":"5BXGVHSKGSDN436L","created_at":"2026-07-05T04:13:48Z"},{"alias_kind":"pith_short_8","alias_value":"5BXGVHSK","created_at":"2026-07-05T04:13:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:5BXGVHSKGSDN436LJ3KWCBTTKM","target":"record","payload":{"canonical_record":{"source":{"id":"2112.08112","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2021-12-15T13:26:26Z","cross_cats_sorted":[],"title_canon_sha256":"f280bd7ca0b92b6b8918f77d59453f861030da0d5ff3641ceb6b074cedab815a","abstract_canon_sha256":"b86f14ae5e1b6ecf196ace09444f29863c536fc41852c8138cfcda6d7a6268a9"},"schema_version":"1.0"},"canonical_sha256":"e86e6a9e4a3486de6fcb4ed56106735326275a11ca6f2acd2e09ea994a484a15","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:13:48.078665Z","signature_b64":"XjQbksNnwOmG7gGU6eTn16KKqhU3qCheDivXDA0sG2rtuDlj27p/ukuy5A4FyRZ6mF2YZTJvYR5Mk3PNh8soBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e86e6a9e4a3486de6fcb4ed56106735326275a11ca6f2acd2e09ea994a484a15","last_reissued_at":"2026-07-05T04:13:48.078201Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:13:48.078201Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2112.08112","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":"2026-07-05T04:13:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bMWQqgrG6s76xe4uRkrbFZNLkaXnj2zmFtMEqDreImZoDBNELipxs9DilYsI7CtRFW6ZHjwCFQgc3xnEYggHBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T14:26:48.432139Z"},"content_sha256":"ca144a75fa7234824bb024b8787c42bbb287fdeb62c8a2a3f3700fe2aaee83ff","schema_version":"1.0","event_id":"sha256:ca144a75fa7234824bb024b8787c42bbb287fdeb62c8a2a3f3700fe2aaee83ff"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:5BXGVHSKGSDN436LJ3KWCBTTKM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Infrared super-resolution wide-field microscopy using sum-frequency generation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Alexander Paarmann, Guanyu Lu, Joshua D. Caldwell, Marco De Pas, Martin Wolf, Richarda Niemann, Sandy Gewinner, S\\\"oren Wasserroth, Wieland Sch\\\"ollkopf","submitted_at":"2021-12-15T13:26:26Z","abstract_excerpt":"Super-resolution microscopy in the visible is an established powerful tool in several disciplines. In the infrared (IR) spectral range, however, no comparable schemes have been demonstrated to date. In this work, we experimentally demonstrate super-resolution microscopy in the IR range ($\\lambda_{IR}\\approx 10-12\\,\\mu$m) using IR-visible sum-frequency generation. We operate our microscope in a wide-field scheme and image localized surface phonon polaritons in 4H-SiC nanostructures as a proof-of-concept. With this technique, we demonstrate an enhanced spatial resolution of $\\sim\\lambda_{IR}/9$,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.08112","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/2112.08112/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":"2026-07-05T04:13:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Oh+iy4JtEMGGJQnhW/IoQhysDDhCobNkeMoP8+IpUHPxR97QEHH86pZJC/VIUi7dW+t+B0urhSZ1wbyptJCiBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T14:26:48.432527Z"},"content_sha256":"008642e3923e912be2f0b6787a53323143f3921281458dc3183022724050d7f5","schema_version":"1.0","event_id":"sha256:008642e3923e912be2f0b6787a53323143f3921281458dc3183022724050d7f5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5BXGVHSKGSDN436LJ3KWCBTTKM/bundle.json","state_url":"https://pith.science/pith/5BXGVHSKGSDN436LJ3KWCBTTKM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5BXGVHSKGSDN436LJ3KWCBTTKM/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":"2026-07-07T14:26:48Z","links":{"resolver":"https://pith.science/pith/5BXGVHSKGSDN436LJ3KWCBTTKM","bundle":"https://pith.science/pith/5BXGVHSKGSDN436LJ3KWCBTTKM/bundle.json","state":"https://pith.science/pith/5BXGVHSKGSDN436LJ3KWCBTTKM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5BXGVHSKGSDN436LJ3KWCBTTKM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:5BXGVHSKGSDN436LJ3KWCBTTKM","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":"b86f14ae5e1b6ecf196ace09444f29863c536fc41852c8138cfcda6d7a6268a9","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2021-12-15T13:26:26Z","title_canon_sha256":"f280bd7ca0b92b6b8918f77d59453f861030da0d5ff3641ceb6b074cedab815a"},"schema_version":"1.0","source":{"id":"2112.08112","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.08112","created_at":"2026-07-05T04:13:48Z"},{"alias_kind":"arxiv_version","alias_value":"2112.08112v1","created_at":"2026-07-05T04:13:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.08112","created_at":"2026-07-05T04:13:48Z"},{"alias_kind":"pith_short_12","alias_value":"5BXGVHSKGSDN","created_at":"2026-07-05T04:13:48Z"},{"alias_kind":"pith_short_16","alias_value":"5BXGVHSKGSDN436L","created_at":"2026-07-05T04:13:48Z"},{"alias_kind":"pith_short_8","alias_value":"5BXGVHSK","created_at":"2026-07-05T04:13:48Z"}],"graph_snapshots":[{"event_id":"sha256:008642e3923e912be2f0b6787a53323143f3921281458dc3183022724050d7f5","target":"graph","created_at":"2026-07-05T04:13:48Z","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/2112.08112/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Super-resolution microscopy in the visible is an established powerful tool in several disciplines. In the infrared (IR) spectral range, however, no comparable schemes have been demonstrated to date. In this work, we experimentally demonstrate super-resolution microscopy in the IR range ($\\lambda_{IR}\\approx 10-12\\,\\mu$m) using IR-visible sum-frequency generation. We operate our microscope in a wide-field scheme and image localized surface phonon polaritons in 4H-SiC nanostructures as a proof-of-concept. With this technique, we demonstrate an enhanced spatial resolution of $\\sim\\lambda_{IR}/9$,","authors_text":"Alexander Paarmann, Guanyu Lu, Joshua D. Caldwell, Marco De Pas, Martin Wolf, Richarda Niemann, Sandy Gewinner, S\\\"oren Wasserroth, Wieland Sch\\\"ollkopf","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2021-12-15T13:26:26Z","title":"Infrared super-resolution wide-field microscopy using sum-frequency generation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.08112","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:ca144a75fa7234824bb024b8787c42bbb287fdeb62c8a2a3f3700fe2aaee83ff","target":"record","created_at":"2026-07-05T04:13:48Z","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":"b86f14ae5e1b6ecf196ace09444f29863c536fc41852c8138cfcda6d7a6268a9","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2021-12-15T13:26:26Z","title_canon_sha256":"f280bd7ca0b92b6b8918f77d59453f861030da0d5ff3641ceb6b074cedab815a"},"schema_version":"1.0","source":{"id":"2112.08112","kind":"arxiv","version":1}},"canonical_sha256":"e86e6a9e4a3486de6fcb4ed56106735326275a11ca6f2acd2e09ea994a484a15","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e86e6a9e4a3486de6fcb4ed56106735326275a11ca6f2acd2e09ea994a484a15","first_computed_at":"2026-07-05T04:13:48.078201Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:13:48.078201Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XjQbksNnwOmG7gGU6eTn16KKqhU3qCheDivXDA0sG2rtuDlj27p/ukuy5A4FyRZ6mF2YZTJvYR5Mk3PNh8soBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:13:48.078665Z","signed_message":"canonical_sha256_bytes"},"source_id":"2112.08112","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ca144a75fa7234824bb024b8787c42bbb287fdeb62c8a2a3f3700fe2aaee83ff","sha256:008642e3923e912be2f0b6787a53323143f3921281458dc3183022724050d7f5"],"state_sha256":"0bdbb2871cf80a1ca740b4d741c86e00a652b81c0f2fb685b5653b60f5c71d5a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bBFlvKI9B5QBLfbSnhKelgnGxuXxhxEh79B+5Zwe81xe4eJt5SR9r9M09uNyaGXfadjwZR3s5EqaWJO+KPpIDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T14:26:48.434512Z","bundle_sha256":"ff387bb7b090dc95977195e309f9efd0dae7e3e7590f14a25d4fd96cfb93494a"}}