{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:FRNJIWN4UNGTRIUE55TBBRZ4FN","short_pith_number":"pith:FRNJIWN4","canonical_record":{"source":{"id":"1808.03554","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-08-10T14:07:50Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"752c51a8670a53d53f8442da74dce58fb17a1a545fb2ebfe22b3849205efc1b4","abstract_canon_sha256":"a539be590b522263d0cd8a922102f069b321a1f5464a32f1b87299f536d9bf31"},"schema_version":"1.0"},"canonical_sha256":"2c5a9459bca34d38a284ef6610c73c2b52462415215c092a53a0e344a99f39b0","source":{"kind":"arxiv","id":"1808.03554","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.03554","created_at":"2026-07-05T00:29:35Z"},{"alias_kind":"arxiv_version","alias_value":"1808.03554v2","created_at":"2026-07-05T00:29:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.03554","created_at":"2026-07-05T00:29:35Z"},{"alias_kind":"pith_short_12","alias_value":"FRNJIWN4UNGT","created_at":"2026-07-05T00:29:35Z"},{"alias_kind":"pith_short_16","alias_value":"FRNJIWN4UNGTRIUE","created_at":"2026-07-05T00:29:35Z"},{"alias_kind":"pith_short_8","alias_value":"FRNJIWN4","created_at":"2026-07-05T00:29:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:FRNJIWN4UNGTRIUE55TBBRZ4FN","target":"record","payload":{"canonical_record":{"source":{"id":"1808.03554","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-08-10T14:07:50Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"752c51a8670a53d53f8442da74dce58fb17a1a545fb2ebfe22b3849205efc1b4","abstract_canon_sha256":"a539be590b522263d0cd8a922102f069b321a1f5464a32f1b87299f536d9bf31"},"schema_version":"1.0"},"canonical_sha256":"2c5a9459bca34d38a284ef6610c73c2b52462415215c092a53a0e344a99f39b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:29:35.991868Z","signature_b64":"Taz9cY0xFDRm3aMqAjFaBdKMxZ8fzhx10OpXsF7X1ppe9vVap/1koTJ5PzVKsLs9gykwsX+igh170m3TrqEjAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2c5a9459bca34d38a284ef6610c73c2b52462415215c092a53a0e344a99f39b0","last_reissued_at":"2026-07-05T00:29:35.991418Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:29:35.991418Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.03554","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":"2026-07-05T00:29:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZncQje0+9d5UEOBK+bn2ii9nVOYsZgUZSmtaoh7NZEOyqkQMlglHUMsnDSMQwsRaIfdLqIn7QtzKSNPFx2nSAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T11:17:20.233034Z"},"content_sha256":"bcd0e29e12d5b661c77c1f1cf995b45b0dadc86360be96e76ffbe8f0c1cb3e78","schema_version":"1.0","event_id":"sha256:bcd0e29e12d5b661c77c1f1cf995b45b0dadc86360be96e76ffbe8f0c1cb3e78"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:FRNJIWN4UNGTRIUE55TBBRZ4FN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Integrated gallium phosphide nonlinear photonics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"physics.app-ph","authors_text":"Dalziel J. Wilson, Katharina Schneider, Miles Anderson, Paul Seidler, Simon Hoenl, Tobias J. Kippenberg","submitted_at":"2018-08-10T14:07:50Z","abstract_excerpt":"Gallium phosphide (GaP) is an indirect bandgap semiconductor used widely in solid-state lighting. Despite numerous intriguing optical properties---including large $\\chi^{(2)}$ and $\\chi^{(3)}$ coefficients, a high refractive index ($>3$), and transparency from visible to long-infrared wavelengths ($0.55-11\\,\\mu$m)---its application as an integrated photonics material has been little studied. Here we introduce GaP-on-insulator as a platform for nonlinear photonics, exploiting a direct wafer bonding approach to realize integrated waveguides with 1.2 dB/cm loss in the telecommunications C-band (o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.03554","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/1808.03554/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":"2026-07-05T00:29:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GHjEBYR+3Lq2dZO3pT4iKIrcm+3X+LlqD39DUmtwvgrXhmmALtLNI8NRrGz7FGiiK1OCfrUhUnL4Agv7xtLlBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T11:17:20.233439Z"},"content_sha256":"df244a367b1002368da524dd04cf75774e3ef8e783f0b8ce64d547e59e2e9270","schema_version":"1.0","event_id":"sha256:df244a367b1002368da524dd04cf75774e3ef8e783f0b8ce64d547e59e2e9270"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FRNJIWN4UNGTRIUE55TBBRZ4FN/bundle.json","state_url":"https://pith.science/pith/FRNJIWN4UNGTRIUE55TBBRZ4FN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FRNJIWN4UNGTRIUE55TBBRZ4FN/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":"2026-07-07T11:17:20Z","links":{"resolver":"https://pith.science/pith/FRNJIWN4UNGTRIUE55TBBRZ4FN","bundle":"https://pith.science/pith/FRNJIWN4UNGTRIUE55TBBRZ4FN/bundle.json","state":"https://pith.science/pith/FRNJIWN4UNGTRIUE55TBBRZ4FN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FRNJIWN4UNGTRIUE55TBBRZ4FN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:FRNJIWN4UNGTRIUE55TBBRZ4FN","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":"a539be590b522263d0cd8a922102f069b321a1f5464a32f1b87299f536d9bf31","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-08-10T14:07:50Z","title_canon_sha256":"752c51a8670a53d53f8442da74dce58fb17a1a545fb2ebfe22b3849205efc1b4"},"schema_version":"1.0","source":{"id":"1808.03554","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.03554","created_at":"2026-07-05T00:29:35Z"},{"alias_kind":"arxiv_version","alias_value":"1808.03554v2","created_at":"2026-07-05T00:29:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.03554","created_at":"2026-07-05T00:29:35Z"},{"alias_kind":"pith_short_12","alias_value":"FRNJIWN4UNGT","created_at":"2026-07-05T00:29:35Z"},{"alias_kind":"pith_short_16","alias_value":"FRNJIWN4UNGTRIUE","created_at":"2026-07-05T00:29:35Z"},{"alias_kind":"pith_short_8","alias_value":"FRNJIWN4","created_at":"2026-07-05T00:29:35Z"}],"graph_snapshots":[{"event_id":"sha256:df244a367b1002368da524dd04cf75774e3ef8e783f0b8ce64d547e59e2e9270","target":"graph","created_at":"2026-07-05T00:29:35Z","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/1808.03554/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Gallium phosphide (GaP) is an indirect bandgap semiconductor used widely in solid-state lighting. Despite numerous intriguing optical properties---including large $\\chi^{(2)}$ and $\\chi^{(3)}$ coefficients, a high refractive index ($>3$), and transparency from visible to long-infrared wavelengths ($0.55-11\\,\\mu$m)---its application as an integrated photonics material has been little studied. Here we introduce GaP-on-insulator as a platform for nonlinear photonics, exploiting a direct wafer bonding approach to realize integrated waveguides with 1.2 dB/cm loss in the telecommunications C-band (o","authors_text":"Dalziel J. Wilson, Katharina Schneider, Miles Anderson, Paul Seidler, Simon Hoenl, Tobias J. Kippenberg","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-08-10T14:07:50Z","title":"Integrated gallium phosphide nonlinear photonics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.03554","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:bcd0e29e12d5b661c77c1f1cf995b45b0dadc86360be96e76ffbe8f0c1cb3e78","target":"record","created_at":"2026-07-05T00:29:35Z","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":"a539be590b522263d0cd8a922102f069b321a1f5464a32f1b87299f536d9bf31","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-08-10T14:07:50Z","title_canon_sha256":"752c51a8670a53d53f8442da74dce58fb17a1a545fb2ebfe22b3849205efc1b4"},"schema_version":"1.0","source":{"id":"1808.03554","kind":"arxiv","version":2}},"canonical_sha256":"2c5a9459bca34d38a284ef6610c73c2b52462415215c092a53a0e344a99f39b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2c5a9459bca34d38a284ef6610c73c2b52462415215c092a53a0e344a99f39b0","first_computed_at":"2026-07-05T00:29:35.991418Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:29:35.991418Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Taz9cY0xFDRm3aMqAjFaBdKMxZ8fzhx10OpXsF7X1ppe9vVap/1koTJ5PzVKsLs9gykwsX+igh170m3TrqEjAA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:29:35.991868Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.03554","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bcd0e29e12d5b661c77c1f1cf995b45b0dadc86360be96e76ffbe8f0c1cb3e78","sha256:df244a367b1002368da524dd04cf75774e3ef8e783f0b8ce64d547e59e2e9270"],"state_sha256":"a81441a50f4ef3f5231ee2163494b1b0795edadd4e81a6d73c74adc25c85848d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S5rOdINAu9blkA/BY5kePa+3JJpxoH/5X05KCYTkfBqgH2q6bkbqIbd30opu3qVpUvLBMsrDoVOYTGxQM5UiAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T11:17:20.235437Z","bundle_sha256":"67b890f85417887119bfb25aa4e30e5ac33129a613b46e4444232ef51505c532"}}