{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:CMQRPJABLFQR3LHKI33ZJZK6XQ","short_pith_number":"pith:CMQRPJAB","canonical_record":{"source":{"id":"2203.15889","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-03-29T20:23:53Z","cross_cats_sorted":[],"title_canon_sha256":"e13bc91977f87216027f18d717fc25362327866946a58c1549915fca7fcd11de","abstract_canon_sha256":"5e819a9f1680c80bef5ae9c776849022b95d43d1317ec34e9c14e27d34fb46ad"},"schema_version":"1.0"},"canonical_sha256":"132117a40159611dacea46f794e55ebc045619cbd33b433f35ee3d5302b40a7b","source":{"kind":"arxiv","id":"2203.15889","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2203.15889","created_at":"2026-07-05T04:10:04Z"},{"alias_kind":"arxiv_version","alias_value":"2203.15889v1","created_at":"2026-07-05T04:10:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.15889","created_at":"2026-07-05T04:10:04Z"},{"alias_kind":"pith_short_12","alias_value":"CMQRPJABLFQR","created_at":"2026-07-05T04:10:04Z"},{"alias_kind":"pith_short_16","alias_value":"CMQRPJABLFQR3LHK","created_at":"2026-07-05T04:10:04Z"},{"alias_kind":"pith_short_8","alias_value":"CMQRPJAB","created_at":"2026-07-05T04:10:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:CMQRPJABLFQR3LHKI33ZJZK6XQ","target":"record","payload":{"canonical_record":{"source":{"id":"2203.15889","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-03-29T20:23:53Z","cross_cats_sorted":[],"title_canon_sha256":"e13bc91977f87216027f18d717fc25362327866946a58c1549915fca7fcd11de","abstract_canon_sha256":"5e819a9f1680c80bef5ae9c776849022b95d43d1317ec34e9c14e27d34fb46ad"},"schema_version":"1.0"},"canonical_sha256":"132117a40159611dacea46f794e55ebc045619cbd33b433f35ee3d5302b40a7b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:10:04.802375Z","signature_b64":"7xAy1gu44vR10xAaPJEqN3ktexK7FSovBtC7yW8MhUDu+UoYCwnGJoBx8IF12JWALY71uiGbnPOMDv4EsaniAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"132117a40159611dacea46f794e55ebc045619cbd33b433f35ee3d5302b40a7b","last_reissued_at":"2026-07-05T04:10:04.801909Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:10:04.801909Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2203.15889","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":"2026-07-05T04:10:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LHfXvXfqsqKu2xe1r6hs1dOiMZem/dcrXz4MIjjt1I8QhRkmIpHKvT/Y9iPpHW7q1hlUSKRb1i33OMFWPNGMCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T00:17:24.831562Z"},"content_sha256":"acb5a35d091ad21f13526cdb5bab595d536181eb597a6d28e86d21f0b8042f74","schema_version":"1.0","event_id":"sha256:acb5a35d091ad21f13526cdb5bab595d536181eb597a6d28e86d21f0b8042f74"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:CMQRPJABLFQR3LHKI33ZJZK6XQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photo-induced cascaded harmonic and comb generation in silicon nitride microresonators","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Camille-Sophie Br\\`es, Edgars Nitiss, Jianqi Hu, Jijun He, Junqiu Liu, Ozan Yakar, Tobias J. Kippenberg, Wenle Weng","submitted_at":"2022-03-29T20:23:53Z","abstract_excerpt":"Silicon nitride (Si$_3$N$_4$) is an ever-maturing integrated platform for nonlinear optics. Yet, due to the absence of second-order ($\\chi^{(2)}$) nonlinearity, Si$_3$N$_4$ is mostly considered for third-order ($\\chi^{(3)}$) nonlinear interactions. Recently, this limitation was overcome by optical poling in both Si$_3$N$_4$ waveguides and microresonators via the photogalvanic effect, resulting in the inscription of quasi-phase-matched $\\chi^{(2)}$ gratings. Here, we report cascaded nonlinear effects in a normal dispersion Si$_3$N$_4$ microresonator with combined $\\chi^{(2)}$ and $\\chi^{(3)}$ n"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.15889","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/2203.15889/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":"2026-07-05T04:10:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9+H6R2Hmmk/srk3QysI9m+Jaoejp1l0HgSmp/iHUoRxroZWMGGqH4PBauc9GQpDQiJi80tWJ1L5ZILXK8l01CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T00:17:24.832741Z"},"content_sha256":"9b479dba2f48c27b6b6edef36dedb94ed04a6897c93f86898756581ca33ca467","schema_version":"1.0","event_id":"sha256:9b479dba2f48c27b6b6edef36dedb94ed04a6897c93f86898756581ca33ca467"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CMQRPJABLFQR3LHKI33ZJZK6XQ/bundle.json","state_url":"https://pith.science/pith/CMQRPJABLFQR3LHKI33ZJZK6XQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CMQRPJABLFQR3LHKI33ZJZK6XQ/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":"2026-08-14T00:17:24Z","links":{"resolver":"https://pith.science/pith/CMQRPJABLFQR3LHKI33ZJZK6XQ","bundle":"https://pith.science/pith/CMQRPJABLFQR3LHKI33ZJZK6XQ/bundle.json","state":"https://pith.science/pith/CMQRPJABLFQR3LHKI33ZJZK6XQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CMQRPJABLFQR3LHKI33ZJZK6XQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:CMQRPJABLFQR3LHKI33ZJZK6XQ","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":"5e819a9f1680c80bef5ae9c776849022b95d43d1317ec34e9c14e27d34fb46ad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-03-29T20:23:53Z","title_canon_sha256":"e13bc91977f87216027f18d717fc25362327866946a58c1549915fca7fcd11de"},"schema_version":"1.0","source":{"id":"2203.15889","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2203.15889","created_at":"2026-07-05T04:10:04Z"},{"alias_kind":"arxiv_version","alias_value":"2203.15889v1","created_at":"2026-07-05T04:10:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.15889","created_at":"2026-07-05T04:10:04Z"},{"alias_kind":"pith_short_12","alias_value":"CMQRPJABLFQR","created_at":"2026-07-05T04:10:04Z"},{"alias_kind":"pith_short_16","alias_value":"CMQRPJABLFQR3LHK","created_at":"2026-07-05T04:10:04Z"},{"alias_kind":"pith_short_8","alias_value":"CMQRPJAB","created_at":"2026-07-05T04:10:04Z"}],"graph_snapshots":[{"event_id":"sha256:9b479dba2f48c27b6b6edef36dedb94ed04a6897c93f86898756581ca33ca467","target":"graph","created_at":"2026-07-05T04:10:04Z","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/2203.15889/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Silicon nitride (Si$_3$N$_4$) is an ever-maturing integrated platform for nonlinear optics. Yet, due to the absence of second-order ($\\chi^{(2)}$) nonlinearity, Si$_3$N$_4$ is mostly considered for third-order ($\\chi^{(3)}$) nonlinear interactions. Recently, this limitation was overcome by optical poling in both Si$_3$N$_4$ waveguides and microresonators via the photogalvanic effect, resulting in the inscription of quasi-phase-matched $\\chi^{(2)}$ gratings. Here, we report cascaded nonlinear effects in a normal dispersion Si$_3$N$_4$ microresonator with combined $\\chi^{(2)}$ and $\\chi^{(3)}$ n","authors_text":"Camille-Sophie Br\\`es, Edgars Nitiss, Jianqi Hu, Jijun He, Junqiu Liu, Ozan Yakar, Tobias J. Kippenberg, Wenle Weng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-03-29T20:23:53Z","title":"Photo-induced cascaded harmonic and comb generation in silicon nitride microresonators"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.15889","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:acb5a35d091ad21f13526cdb5bab595d536181eb597a6d28e86d21f0b8042f74","target":"record","created_at":"2026-07-05T04:10:04Z","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":"5e819a9f1680c80bef5ae9c776849022b95d43d1317ec34e9c14e27d34fb46ad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2022-03-29T20:23:53Z","title_canon_sha256":"e13bc91977f87216027f18d717fc25362327866946a58c1549915fca7fcd11de"},"schema_version":"1.0","source":{"id":"2203.15889","kind":"arxiv","version":1}},"canonical_sha256":"132117a40159611dacea46f794e55ebc045619cbd33b433f35ee3d5302b40a7b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"132117a40159611dacea46f794e55ebc045619cbd33b433f35ee3d5302b40a7b","first_computed_at":"2026-07-05T04:10:04.801909Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:10:04.801909Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7xAy1gu44vR10xAaPJEqN3ktexK7FSovBtC7yW8MhUDu+UoYCwnGJoBx8IF12JWALY71uiGbnPOMDv4EsaniAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:10:04.802375Z","signed_message":"canonical_sha256_bytes"},"source_id":"2203.15889","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:acb5a35d091ad21f13526cdb5bab595d536181eb597a6d28e86d21f0b8042f74","sha256:9b479dba2f48c27b6b6edef36dedb94ed04a6897c93f86898756581ca33ca467"],"state_sha256":"99b1f16e577a62d31586228bfd8bfa47838ef202273f9b8553a76da3b754ca4c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4QkCnMZ49K7VSdKlMsuNjVf5F7C7RnyCQn4hceG0L07cHrTvA93J8XkgYLepzo4cKiHALi7S1AnfiLdqsfwgBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T00:17:24.902785Z","bundle_sha256":"6a0f1735c4c13836085406b041201a7ed233ba925a67d62f490ce23a3a1d78c0"}}