{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:2YAVOEYWA4IQEUBOOG6EDSHH7X","short_pith_number":"pith:2YAVOEYW","canonical_record":{"source":{"id":"1601.04108","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-01-16T01:16:21Z","cross_cats_sorted":[],"title_canon_sha256":"37e68bade02914d9875eabb10733216ca912e6699e1f4d9d28b287bf501f9e08","abstract_canon_sha256":"54275ce971989a26e173b90ee0683001e49d42bcd0f4dc43d050983ef99e8b99"},"schema_version":"1.0"},"canonical_sha256":"d601571316071102502e71bc41c8e7fddf06b76b96d61366bfcfb94f98f7f09a","source":{"kind":"arxiv","id":"1601.04108","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.04108","created_at":"2026-05-18T00:51:58Z"},{"alias_kind":"arxiv_version","alias_value":"1601.04108v3","created_at":"2026-05-18T00:51:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.04108","created_at":"2026-05-18T00:51:58Z"},{"alias_kind":"pith_short_12","alias_value":"2YAVOEYWA4IQ","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"2YAVOEYWA4IQEUBO","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"2YAVOEYW","created_at":"2026-05-18T12:29:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:2YAVOEYWA4IQEUBOOG6EDSHH7X","target":"record","payload":{"canonical_record":{"source":{"id":"1601.04108","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-01-16T01:16:21Z","cross_cats_sorted":[],"title_canon_sha256":"37e68bade02914d9875eabb10733216ca912e6699e1f4d9d28b287bf501f9e08","abstract_canon_sha256":"54275ce971989a26e173b90ee0683001e49d42bcd0f4dc43d050983ef99e8b99"},"schema_version":"1.0"},"canonical_sha256":"d601571316071102502e71bc41c8e7fddf06b76b96d61366bfcfb94f98f7f09a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:51:58.132831Z","signature_b64":"aCnXrNLCNsOA7TIc0AZvbsSttLM7Wa0vAppDGZaUGSR2UURa6yNfsM+2nTzuA+sf/Xs3JS1usipcfxoOP23RCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d601571316071102502e71bc41c8e7fddf06b76b96d61366bfcfb94f98f7f09a","last_reissued_at":"2026-05-18T00:51:58.132238Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:51:58.132238Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1601.04108","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:51:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ikj38O0C43rYNMcsYQUihwzdNaRV7CMCzpoC9Fk9KPGWxWBGVNTwcicVOlV1cTwrAaqsu7whq+n69mWhKU7cDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T22:35:25.926885Z"},"content_sha256":"4cb8cdbda3eb7e9335afcdd6d506b1b269fa03c610c8544b4931af2868d9b64d","schema_version":"1.0","event_id":"sha256:4cb8cdbda3eb7e9335afcdd6d506b1b269fa03c610c8544b4931af2868d9b64d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:2YAVOEYWA4IQEUBOOG6EDSHH7X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Monolithic Integration of AlGaAs Distributed Bragg Reflectors on Virtual Ge Substrates via Aspect Ratio Trapping","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Guangrui Xia, James G. Fiorenza, Jennifer Hydrick, Ji-Soo Park, Jizhong Li, Lukas Chrostowski, Mark Greenberg, Ting-Chang Chang, Wei Shi, Yiheng Lin, Zigang Duan","submitted_at":"2016-01-16T01:16:21Z","abstract_excerpt":"High quality AlxGa1-xAs distributed Bragg reflectors (DBRs) were successfully monolithically grown on on-axis Si (100) substrates via a Ge layer formed by aspect ratio trapping (ART) technique. The GaAs/ART-Ge/Si-based DBRs have reflectivity spectra comparable to those grown on conventional bulk off-cut GaAs substrates and have smooth morphology, and good periodicity and uniformity. Anitphase domain formation is significantly reduced in GaAs on ART-Ge/Si substrates, and etch pit density of the GaAs base layer on the ART-Ge substrates ranges from 10^5 to 6 x 10^6 cm^(-2). These results paved th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.04108","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T00:51:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DeOzYrP5pxuVfrYA6FUcGI52Wpr44Eoupvet8la85ethDDfL6aqwwmWTOgr6soo0R9Z41AMc8CvFdfx2R1c9Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T22:35:25.927242Z"},"content_sha256":"2a3ecb1e5260a038f2367c198926f86074234c100fa458cc8351a7df334094b7","schema_version":"1.0","event_id":"sha256:2a3ecb1e5260a038f2367c198926f86074234c100fa458cc8351a7df334094b7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2YAVOEYWA4IQEUBOOG6EDSHH7X/bundle.json","state_url":"https://pith.science/pith/2YAVOEYWA4IQEUBOOG6EDSHH7X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2YAVOEYWA4IQEUBOOG6EDSHH7X/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":"2026-06-20T22:35:25Z","links":{"resolver":"https://pith.science/pith/2YAVOEYWA4IQEUBOOG6EDSHH7X","bundle":"https://pith.science/pith/2YAVOEYWA4IQEUBOOG6EDSHH7X/bundle.json","state":"https://pith.science/pith/2YAVOEYWA4IQEUBOOG6EDSHH7X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2YAVOEYWA4IQEUBOOG6EDSHH7X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:2YAVOEYWA4IQEUBOOG6EDSHH7X","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":"54275ce971989a26e173b90ee0683001e49d42bcd0f4dc43d050983ef99e8b99","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-01-16T01:16:21Z","title_canon_sha256":"37e68bade02914d9875eabb10733216ca912e6699e1f4d9d28b287bf501f9e08"},"schema_version":"1.0","source":{"id":"1601.04108","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.04108","created_at":"2026-05-18T00:51:58Z"},{"alias_kind":"arxiv_version","alias_value":"1601.04108v3","created_at":"2026-05-18T00:51:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.04108","created_at":"2026-05-18T00:51:58Z"},{"alias_kind":"pith_short_12","alias_value":"2YAVOEYWA4IQ","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"2YAVOEYWA4IQEUBO","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"2YAVOEYW","created_at":"2026-05-18T12:29:55Z"}],"graph_snapshots":[{"event_id":"sha256:2a3ecb1e5260a038f2367c198926f86074234c100fa458cc8351a7df334094b7","target":"graph","created_at":"2026-05-18T00:51:58Z","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"},"paper":{"abstract_excerpt":"High quality AlxGa1-xAs distributed Bragg reflectors (DBRs) were successfully monolithically grown on on-axis Si (100) substrates via a Ge layer formed by aspect ratio trapping (ART) technique. The GaAs/ART-Ge/Si-based DBRs have reflectivity spectra comparable to those grown on conventional bulk off-cut GaAs substrates and have smooth morphology, and good periodicity and uniformity. Anitphase domain formation is significantly reduced in GaAs on ART-Ge/Si substrates, and etch pit density of the GaAs base layer on the ART-Ge substrates ranges from 10^5 to 6 x 10^6 cm^(-2). These results paved th","authors_text":"Guangrui Xia, James G. Fiorenza, Jennifer Hydrick, Ji-Soo Park, Jizhong Li, Lukas Chrostowski, Mark Greenberg, Ting-Chang Chang, Wei Shi, Yiheng Lin, Zigang Duan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-01-16T01:16:21Z","title":"Monolithic Integration of AlGaAs Distributed Bragg Reflectors on Virtual Ge Substrates via Aspect Ratio Trapping"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.04108","kind":"arxiv","version":3},"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":"sha256:4cb8cdbda3eb7e9335afcdd6d506b1b269fa03c610c8544b4931af2868d9b64d","target":"record","created_at":"2026-05-18T00:51:58Z","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":"54275ce971989a26e173b90ee0683001e49d42bcd0f4dc43d050983ef99e8b99","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-01-16T01:16:21Z","title_canon_sha256":"37e68bade02914d9875eabb10733216ca912e6699e1f4d9d28b287bf501f9e08"},"schema_version":"1.0","source":{"id":"1601.04108","kind":"arxiv","version":3}},"canonical_sha256":"d601571316071102502e71bc41c8e7fddf06b76b96d61366bfcfb94f98f7f09a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d601571316071102502e71bc41c8e7fddf06b76b96d61366bfcfb94f98f7f09a","first_computed_at":"2026-05-18T00:51:58.132238Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:51:58.132238Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aCnXrNLCNsOA7TIc0AZvbsSttLM7Wa0vAppDGZaUGSR2UURa6yNfsM+2nTzuA+sf/Xs3JS1usipcfxoOP23RCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:51:58.132831Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.04108","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4cb8cdbda3eb7e9335afcdd6d506b1b269fa03c610c8544b4931af2868d9b64d","sha256:2a3ecb1e5260a038f2367c198926f86074234c100fa458cc8351a7df334094b7"],"state_sha256":"e11a84b246476a67d374340bf5f62964d53bc32217899419ea259ff9cc821fb3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Go8iuqc0FgKM+8ihClaRkuhzrZaN4gqLQQciyKOr36wBhxi+0f9I4pPTVGNKOCN1FZae0zjaZpmBKXSTzamNCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-20T22:35:25.929256Z","bundle_sha256":"1c0df4f5532c540ba03a4d5d8b834bd534585b13b12e2da5b6028b4571d27574"}}