{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:BCRPBOSYCGQLZXSHZ5O5XA4WCJ","short_pith_number":"pith:BCRPBOSY","canonical_record":{"source":{"id":"2402.19165","kind":"arxiv","version":4},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2024-02-29T13:48:24Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"1be0934038867af0603c043db96b4bb634dcfb262c6f94898ceda75087c6cb01","abstract_canon_sha256":"bb3bcb498b6471a4339bcfd65c108c3d44578609bba9584bf143c6ebd4edb1f4"},"schema_version":"1.0"},"canonical_sha256":"08a2f0ba5811a0bcde47cf5ddb839612756b70cbc7bdeb7b2ddd899e9ff7b0bb","source":{"kind":"arxiv","id":"2402.19165","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2402.19165","created_at":"2026-07-05T11:33:01Z"},{"alias_kind":"arxiv_version","alias_value":"2402.19165v4","created_at":"2026-07-05T11:33:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2402.19165","created_at":"2026-07-05T11:33:01Z"},{"alias_kind":"pith_short_12","alias_value":"BCRPBOSYCGQL","created_at":"2026-07-05T11:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"BCRPBOSYCGQLZXSH","created_at":"2026-07-05T11:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"BCRPBOSY","created_at":"2026-07-05T11:33:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:BCRPBOSYCGQLZXSHZ5O5XA4WCJ","target":"record","payload":{"canonical_record":{"source":{"id":"2402.19165","kind":"arxiv","version":4},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2024-02-29T13:48:24Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"1be0934038867af0603c043db96b4bb634dcfb262c6f94898ceda75087c6cb01","abstract_canon_sha256":"bb3bcb498b6471a4339bcfd65c108c3d44578609bba9584bf143c6ebd4edb1f4"},"schema_version":"1.0"},"canonical_sha256":"08a2f0ba5811a0bcde47cf5ddb839612756b70cbc7bdeb7b2ddd899e9ff7b0bb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:33:01.265639Z","signature_b64":"JzBoI6iPa21yfSAivYk5bhyWss1bK6s1uj8Mr249miX9JwzEvDEPisE8b7NyaxPfZwzQaoDXY3YSXykS3g45BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"08a2f0ba5811a0bcde47cf5ddb839612756b70cbc7bdeb7b2ddd899e9ff7b0bb","last_reissued_at":"2026-07-05T11:33:01.265182Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:33:01.265182Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2402.19165","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:33:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sg5Slz0VK0bZ7jjAioRY09eVqfEenf/H5QhrdKvIK7qkbqJOhJY+pNoslhcF18QES1GeJDSFz2Gx5vVX2V1SDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T11:37:13.724634Z"},"content_sha256":"c30a9b45613148a6025e9aaec10fef7fed8a85be5c8ab0da67f21712b55d35f9","schema_version":"1.0","event_id":"sha256:c30a9b45613148a6025e9aaec10fef7fed8a85be5c8ab0da67f21712b55d35f9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:BCRPBOSYCGQLZXSHZ5O5XA4WCJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"5.0 $\\mu$m emitting Interband Cascade Lasers with Superlattice and Bulk AlGaAsSb Claddings","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"physics.app-ph","authors_text":"A. Bader, B. Petrovi\\'c, F. Hartmann, J. Nausch\\\"utz, R. Weih, S. Birner, S. H\\\"ofling, T. Sato","submitted_at":"2024-02-29T13:48:24Z","abstract_excerpt":"We present a comparison between interband cascade lasers (ICLs) with a 6-stage active region emitting at 5 $\\mu$m with AlSb/InAs superlattice claddings and with bulk Al_0.85 Ga_0.15 As_0.07 Sb_0.93 claddings. Utilizing bulk AlGaAsSb claddings with their lower refractive index compared to the more commonly used AlSb/InAs superlattice claddings, the mode-confinement in the active region increases by 14.4% resulting in an improvement of the lasing threshold current density. For broad area laser and under pulsed excitation, the ICL with AlGaAsSb claddings shows a lower threshold current density of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2402.19165","kind":"arxiv","version":4},"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/2402.19165/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":"2026-07-05T11:33:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ih5iZFbEbIcrkdhhuWRnBNKCQvukANtiBtrhn6HmhruW+qa2iBpUBjFJTfTUhaYxuGH5S97DWHPI31IbTI09DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T11:37:13.725451Z"},"content_sha256":"965f792655df7aa823b5df1f27c4fa417c00754ff9e0719275d8e49dfbc5dc59","schema_version":"1.0","event_id":"sha256:965f792655df7aa823b5df1f27c4fa417c00754ff9e0719275d8e49dfbc5dc59"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BCRPBOSYCGQLZXSHZ5O5XA4WCJ/bundle.json","state_url":"https://pith.science/pith/BCRPBOSYCGQLZXSHZ5O5XA4WCJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BCRPBOSYCGQLZXSHZ5O5XA4WCJ/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":"2026-08-04T11:37:13Z","links":{"resolver":"https://pith.science/pith/BCRPBOSYCGQLZXSHZ5O5XA4WCJ","bundle":"https://pith.science/pith/BCRPBOSYCGQLZXSHZ5O5XA4WCJ/bundle.json","state":"https://pith.science/pith/BCRPBOSYCGQLZXSHZ5O5XA4WCJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BCRPBOSYCGQLZXSHZ5O5XA4WCJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:BCRPBOSYCGQLZXSHZ5O5XA4WCJ","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":"bb3bcb498b6471a4339bcfd65c108c3d44578609bba9584bf143c6ebd4edb1f4","cross_cats_sorted":["physics.optics"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2024-02-29T13:48:24Z","title_canon_sha256":"1be0934038867af0603c043db96b4bb634dcfb262c6f94898ceda75087c6cb01"},"schema_version":"1.0","source":{"id":"2402.19165","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2402.19165","created_at":"2026-07-05T11:33:01Z"},{"alias_kind":"arxiv_version","alias_value":"2402.19165v4","created_at":"2026-07-05T11:33:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2402.19165","created_at":"2026-07-05T11:33:01Z"},{"alias_kind":"pith_short_12","alias_value":"BCRPBOSYCGQL","created_at":"2026-07-05T11:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"BCRPBOSYCGQLZXSH","created_at":"2026-07-05T11:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"BCRPBOSY","created_at":"2026-07-05T11:33:01Z"}],"graph_snapshots":[{"event_id":"sha256:965f792655df7aa823b5df1f27c4fa417c00754ff9e0719275d8e49dfbc5dc59","target":"graph","created_at":"2026-07-05T11:33:01Z","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/2402.19165/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a comparison between interband cascade lasers (ICLs) with a 6-stage active region emitting at 5 $\\mu$m with AlSb/InAs superlattice claddings and with bulk Al_0.85 Ga_0.15 As_0.07 Sb_0.93 claddings. Utilizing bulk AlGaAsSb claddings with their lower refractive index compared to the more commonly used AlSb/InAs superlattice claddings, the mode-confinement in the active region increases by 14.4% resulting in an improvement of the lasing threshold current density. For broad area laser and under pulsed excitation, the ICL with AlGaAsSb claddings shows a lower threshold current density of","authors_text":"A. Bader, B. Petrovi\\'c, F. Hartmann, J. Nausch\\\"utz, R. Weih, S. Birner, S. H\\\"ofling, T. Sato","cross_cats":["physics.optics"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2024-02-29T13:48:24Z","title":"5.0 $\\mu$m emitting Interband Cascade Lasers with Superlattice and Bulk AlGaAsSb Claddings"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2402.19165","kind":"arxiv","version":4},"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:c30a9b45613148a6025e9aaec10fef7fed8a85be5c8ab0da67f21712b55d35f9","target":"record","created_at":"2026-07-05T11:33:01Z","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":"bb3bcb498b6471a4339bcfd65c108c3d44578609bba9584bf143c6ebd4edb1f4","cross_cats_sorted":["physics.optics"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2024-02-29T13:48:24Z","title_canon_sha256":"1be0934038867af0603c043db96b4bb634dcfb262c6f94898ceda75087c6cb01"},"schema_version":"1.0","source":{"id":"2402.19165","kind":"arxiv","version":4}},"canonical_sha256":"08a2f0ba5811a0bcde47cf5ddb839612756b70cbc7bdeb7b2ddd899e9ff7b0bb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"08a2f0ba5811a0bcde47cf5ddb839612756b70cbc7bdeb7b2ddd899e9ff7b0bb","first_computed_at":"2026-07-05T11:33:01.265182Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:33:01.265182Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JzBoI6iPa21yfSAivYk5bhyWss1bK6s1uj8Mr249miX9JwzEvDEPisE8b7NyaxPfZwzQaoDXY3YSXykS3g45BA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:33:01.265639Z","signed_message":"canonical_sha256_bytes"},"source_id":"2402.19165","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c30a9b45613148a6025e9aaec10fef7fed8a85be5c8ab0da67f21712b55d35f9","sha256:965f792655df7aa823b5df1f27c4fa417c00754ff9e0719275d8e49dfbc5dc59"],"state_sha256":"5d2dfbc4ade884db2fbdaab238b86b324952293a9ed0d84f6dbef1e35000a992"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rO4NgtEXDaXwfRTfBFwblbC0UEefpBlW7R0HZDNzv2RpTzMTLsiX+ErJp4UEe3AMAlIGoIAHLR8CqD9Wdx7wAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T11:37:13.730062Z","bundle_sha256":"18795a612ba8d4adb7f76085ce728e89fb56b6933a9a44f2946970bd415331d8"}}