{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:AW7YJK7GEIRND2J4QLGWVSAYUY","short_pith_number":"pith:AW7YJK7G","canonical_record":{"source":{"id":"2604.22301","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-04-24T07:33:30Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"5c9367aac2653c81c42409d5060a7bd15911d305567b8d4c3cf703cb137ef027","abstract_canon_sha256":"74acff3a1ba4949792e25b7594feb0d015dc892c11fd90a3b2bad2428ccd128f"},"schema_version":"1.0"},"canonical_sha256":"05bf84abe62222d1e93c82cd6ac818a6230ed93a9f8a9bdb540f0b104c58b0b5","source":{"kind":"arxiv","id":"2604.22301","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2604.22301","created_at":"2026-07-17T01:20:50Z"},{"alias_kind":"arxiv_version","alias_value":"2604.22301v2","created_at":"2026-07-17T01:20:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2604.22301","created_at":"2026-07-17T01:20:50Z"},{"alias_kind":"pith_short_12","alias_value":"AW7YJK7GEIRN","created_at":"2026-07-17T01:20:50Z"},{"alias_kind":"pith_short_16","alias_value":"AW7YJK7GEIRND2J4","created_at":"2026-07-17T01:20:50Z"},{"alias_kind":"pith_short_8","alias_value":"AW7YJK7G","created_at":"2026-07-17T01:20:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:AW7YJK7GEIRND2J4QLGWVSAYUY","target":"record","payload":{"canonical_record":{"source":{"id":"2604.22301","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-04-24T07:33:30Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"5c9367aac2653c81c42409d5060a7bd15911d305567b8d4c3cf703cb137ef027","abstract_canon_sha256":"74acff3a1ba4949792e25b7594feb0d015dc892c11fd90a3b2bad2428ccd128f"},"schema_version":"1.0"},"canonical_sha256":"05bf84abe62222d1e93c82cd6ac818a6230ed93a9f8a9bdb540f0b104c58b0b5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-17T01:20:50.100938Z","signature_b64":"BuJIaC5e1pwaMoyLgLbQ19XmGUuuB3wyLblw3EmBSIW+lD8zAGb41L64kTsG2D57fgw+r0bWmHPkH/rjeTYYAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"05bf84abe62222d1e93c82cd6ac818a6230ed93a9f8a9bdb540f0b104c58b0b5","last_reissued_at":"2026-07-17T01:20:50.100090Z","signature_status":"signed_v1","first_computed_at":"2026-07-17T01:20:50.100090Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2604.22301","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":"2026-07-17T01:20:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3zKx/ESdXdwemP31jg79I5Z37RBXjD8Y5PauLP/UlyAiQLTmVAzUQaA8gEWgScRSlnAxMzK+Be8dyk2T9QsfBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T04:31:15.023353Z"},"content_sha256":"f761dc74a8b463705cdde0420f15d41f06aa5b62a203d27c5e6902657f259e43","schema_version":"1.0","event_id":"sha256:f761dc74a8b463705cdde0420f15d41f06aa5b62a203d27c5e6902657f259e43"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:AW7YJK7GEIRND2J4QLGWVSAYUY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Thin Film AlN Microbolometer for Very Long-Wave Infrared Detection","license":"http://creativecommons.org/licenses/by/4.0/","headline":"A suspended 100-nm AlN film over a reflector produces a narrowband microbolometer peaking at 15.48 micrometers in the very long-wave infrared.","cross_cats":["physics.app-ph"],"primary_cat":"physics.optics","authors_text":"Daniel Wasserman, Ian Anderson, Ruochen Lu, Vivek Tallavajhula, Yinan Wang, Zarko Sakotic","submitted_at":"2026-04-24T07:33:30Z","abstract_excerpt":"We demonstrate a suspended thin-film aluminum nitride (AlN) microbolometer for narrowband very long-wave infrared detection. The device uses a 100-nm-thick AlN membrane suspended above a Pt back reflector by a 1-um air gap. Resonant absorption is set by the AlN transverse optical phonon near 15.4 um and is strengthened by suspension above the reflector. A periodic perforation pattern reduces membrane thermal mass and enhances absorption without further thinning the film. DC resistance measurements under tunable infrared illumination verify bolometric operation, and the measured spectral respon"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"We demonstrate a suspended thin-film aluminum nitride (AlN) microbolometer for narrowband very long-wave infrared detection... Narrowband response is observed in the 14--18 um range, with peak responsivity of 920.8 ppm/mW at 15.48 um.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That DC resistance changes under tunable IR illumination purely reflect bolometric heating and that the measured spectral response accurately matches the absorption profile from passive spectroscopic measurements without confounding effects.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"A thin suspended AlN microbolometer achieves narrowband VLWIR detection with peak responsivity of 920.8 ppm/mW at 15.48 μm by leveraging phonon resonance and reduced thermal mass.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"A suspended 100-nm AlN film over a reflector produces a narrowband microbolometer peaking at 15.48 micrometers in the very long-wave infrared.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"1279a493c847ac2d526c85652d5b3cd0efaf961aa874255ceef7a4e0659c73ac"},"source":{"id":"2604.22301","kind":"arxiv","version":2},"verdict":{"id":"cf6804b8-3e8d-4e33-89ea-3d7b0dbd3ffe","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-08T10:48:01.329121Z","strongest_claim":"We demonstrate a suspended thin-film aluminum nitride (AlN) microbolometer for narrowband very long-wave infrared detection... Narrowband response is observed in the 14--18 um range, with peak responsivity of 920.8 ppm/mW at 15.48 um.","one_line_summary":"A thin suspended AlN microbolometer achieves narrowband VLWIR detection with peak responsivity of 920.8 ppm/mW at 15.48 μm by leveraging phonon resonance and reduced thermal mass.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That DC resistance changes under tunable IR illumination purely reflect bolometric heating and that the measured spectral response accurately matches the absorption profile from passive spectroscopic measurements without confounding effects.","pith_extraction_headline":"A suspended 100-nm AlN film over a reflector produces a narrowband microbolometer peaking at 15.48 micrometers in the very long-wave infrared."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2604.22301/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"ai_meta_artifact","ran_at":"2026-05-21T10:42:48.195131Z","status":"completed","version":"1.0.0","findings_count":0},{"name":"doi_compliance","ran_at":"2026-05-20T00:06:39.737977Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"c52eb3a35f4f4be9e3e45fd52ddceafd602175195371ccb9ae992b9a3a146484"},"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":"cf6804b8-3e8d-4e33-89ea-3d7b0dbd3ffe"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-17T01:20:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9P8RFWkDwwWmfpx6PpOcd2ho4LiJcLjZqp2zf4nRDtKtB+2OD7OP3Rznn5P3GE2PmUmLpMygvmGX/U7rCHVLCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T04:31:15.024110Z"},"content_sha256":"b0ec5fc1fc0f723fb6b737238eec98ec48608b39b8d09a06b0a75411be7052e3","schema_version":"1.0","event_id":"sha256:b0ec5fc1fc0f723fb6b737238eec98ec48608b39b8d09a06b0a75411be7052e3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AW7YJK7GEIRND2J4QLGWVSAYUY/bundle.json","state_url":"https://pith.science/pith/AW7YJK7GEIRND2J4QLGWVSAYUY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AW7YJK7GEIRND2J4QLGWVSAYUY/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":"2026-08-06T04:31:15Z","links":{"resolver":"https://pith.science/pith/AW7YJK7GEIRND2J4QLGWVSAYUY","bundle":"https://pith.science/pith/AW7YJK7GEIRND2J4QLGWVSAYUY/bundle.json","state":"https://pith.science/pith/AW7YJK7GEIRND2J4QLGWVSAYUY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AW7YJK7GEIRND2J4QLGWVSAYUY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:AW7YJK7GEIRND2J4QLGWVSAYUY","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":"74acff3a1ba4949792e25b7594feb0d015dc892c11fd90a3b2bad2428ccd128f","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-04-24T07:33:30Z","title_canon_sha256":"5c9367aac2653c81c42409d5060a7bd15911d305567b8d4c3cf703cb137ef027"},"schema_version":"1.0","source":{"id":"2604.22301","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2604.22301","created_at":"2026-07-17T01:20:50Z"},{"alias_kind":"arxiv_version","alias_value":"2604.22301v2","created_at":"2026-07-17T01:20:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2604.22301","created_at":"2026-07-17T01:20:50Z"},{"alias_kind":"pith_short_12","alias_value":"AW7YJK7GEIRN","created_at":"2026-07-17T01:20:50Z"},{"alias_kind":"pith_short_16","alias_value":"AW7YJK7GEIRND2J4","created_at":"2026-07-17T01:20:50Z"},{"alias_kind":"pith_short_8","alias_value":"AW7YJK7G","created_at":"2026-07-17T01:20:50Z"}],"graph_snapshots":[{"event_id":"sha256:b0ec5fc1fc0f723fb6b737238eec98ec48608b39b8d09a06b0a75411be7052e3","target":"graph","created_at":"2026-07-17T01:20:50Z","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":4,"items":[{"attestation":"unclaimed","claim_id":"C1","kind":"strongest_claim","source":"verdict.strongest_claim","status":"machine_extracted","text":"We demonstrate a suspended thin-film aluminum nitride (AlN) microbolometer for narrowband very long-wave infrared detection... Narrowband response is observed in the 14--18 um range, with peak responsivity of 920.8 ppm/mW at 15.48 um."},{"attestation":"unclaimed","claim_id":"C2","kind":"weakest_assumption","source":"verdict.weakest_assumption","status":"machine_extracted","text":"That DC resistance changes under tunable IR illumination purely reflect bolometric heating and that the measured spectral response accurately matches the absorption profile from passive spectroscopic measurements without confounding effects."},{"attestation":"unclaimed","claim_id":"C3","kind":"one_line_summary","source":"verdict.one_line_summary","status":"machine_extracted","text":"A thin suspended AlN microbolometer achieves narrowband VLWIR detection with peak responsivity of 920.8 ppm/mW at 15.48 μm by leveraging phonon resonance and reduced thermal mass."},{"attestation":"unclaimed","claim_id":"C4","kind":"headline","source":"verdict.pith_extraction.headline","status":"machine_extracted","text":"A suspended 100-nm AlN film over a reflector produces a narrowband microbolometer peaking at 15.48 micrometers in the very long-wave infrared."}],"snapshot_sha256":"1279a493c847ac2d526c85652d5b3cd0efaf961aa874255ceef7a4e0659c73ac"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[{"findings_count":0,"name":"ai_meta_artifact","ran_at":"2026-05-21T10:42:48.195131Z","status":"completed","version":"1.0.0"},{"findings_count":0,"name":"doi_compliance","ran_at":"2026-05-20T00:06:39.737977Z","status":"completed","version":"1.0.0"}],"endpoint":"/pith/2604.22301/integrity.json","findings":[],"snapshot_sha256":"c52eb3a35f4f4be9e3e45fd52ddceafd602175195371ccb9ae992b9a3a146484","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We demonstrate a suspended thin-film aluminum nitride (AlN) microbolometer for narrowband very long-wave infrared detection. The device uses a 100-nm-thick AlN membrane suspended above a Pt back reflector by a 1-um air gap. Resonant absorption is set by the AlN transverse optical phonon near 15.4 um and is strengthened by suspension above the reflector. A periodic perforation pattern reduces membrane thermal mass and enhances absorption without further thinning the film. DC resistance measurements under tunable infrared illumination verify bolometric operation, and the measured spectral respon","authors_text":"Daniel Wasserman, Ian Anderson, Ruochen Lu, Vivek Tallavajhula, Yinan Wang, Zarko Sakotic","cross_cats":["physics.app-ph"],"headline":"A suspended 100-nm AlN film over a reflector produces a narrowband microbolometer peaking at 15.48 micrometers in the very long-wave infrared.","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-04-24T07:33:30Z","title":"Thin Film AlN Microbolometer for Very Long-Wave Infrared Detection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2604.22301","kind":"arxiv","version":2},"verdict":{"created_at":"2026-05-08T10:48:01.329121Z","id":"cf6804b8-3e8d-4e33-89ea-3d7b0dbd3ffe","model_set":{"reader":"grok-4.3"},"one_line_summary":"A thin suspended AlN microbolometer achieves narrowband VLWIR detection with peak responsivity of 920.8 ppm/mW at 15.48 μm by leveraging phonon resonance and reduced thermal mass.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"A suspended 100-nm AlN film over a reflector produces a narrowband microbolometer peaking at 15.48 micrometers in the very long-wave infrared.","strongest_claim":"We demonstrate a suspended thin-film aluminum nitride (AlN) microbolometer for narrowband very long-wave infrared detection... Narrowband response is observed in the 14--18 um range, with peak responsivity of 920.8 ppm/mW at 15.48 um.","weakest_assumption":"That DC resistance changes under tunable IR illumination purely reflect bolometric heating and that the measured spectral response accurately matches the absorption profile from passive spectroscopic measurements without confounding effects."}},"verdict_id":"cf6804b8-3e8d-4e33-89ea-3d7b0dbd3ffe"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:f761dc74a8b463705cdde0420f15d41f06aa5b62a203d27c5e6902657f259e43","target":"record","created_at":"2026-07-17T01:20:50Z","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":"74acff3a1ba4949792e25b7594feb0d015dc892c11fd90a3b2bad2428ccd128f","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2026-04-24T07:33:30Z","title_canon_sha256":"5c9367aac2653c81c42409d5060a7bd15911d305567b8d4c3cf703cb137ef027"},"schema_version":"1.0","source":{"id":"2604.22301","kind":"arxiv","version":2}},"canonical_sha256":"05bf84abe62222d1e93c82cd6ac818a6230ed93a9f8a9bdb540f0b104c58b0b5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"05bf84abe62222d1e93c82cd6ac818a6230ed93a9f8a9bdb540f0b104c58b0b5","first_computed_at":"2026-07-17T01:20:50.100090Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-17T01:20:50.100090Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BuJIaC5e1pwaMoyLgLbQ19XmGUuuB3wyLblw3EmBSIW+lD8zAGb41L64kTsG2D57fgw+r0bWmHPkH/rjeTYYAA==","signature_status":"signed_v1","signed_at":"2026-07-17T01:20:50.100938Z","signed_message":"canonical_sha256_bytes"},"source_id":"2604.22301","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f761dc74a8b463705cdde0420f15d41f06aa5b62a203d27c5e6902657f259e43","sha256:b0ec5fc1fc0f723fb6b737238eec98ec48608b39b8d09a06b0a75411be7052e3"],"state_sha256":"c792d47356b91216c2f8dc85eb0d7660e39bc17c3bb702906da9eb96ba435d3b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iyjqKDjxcr09MqIaestMq32y+OoBQkD/wAHexvwM/UoESf4rd8z946g2Hvjw1Y6fxjIC7lmvZSskTSYQI9pGBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T04:31:15.032475Z","bundle_sha256":"fe3b0dd2930e48d72bf234fe90f185de2fa581d6672a5a1a0cf5c663bd0d9cef"}}