{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:UBPWERQHL6CEQMUNP3NGCZD7R7","short_pith_number":"pith:UBPWERQH","canonical_record":{"source":{"id":"2405.17125","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2024-05-27T12:43:07Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"43046d8d09f486d2d31dec28d03122f7b3aff8f85bc08ea3461b64f1a7f59e92","abstract_canon_sha256":"504fef114b23f5eb17f554cf7902c4d334f945ac1bfcc7372b51e4085b15802e"},"schema_version":"1.0"},"canonical_sha256":"a05f6246075f8448328d7eda61647f8ff6a3fc57d8ad116d46ca535908f9d957","source":{"kind":"arxiv","id":"2405.17125","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2405.17125","created_at":"2026-07-05T08:23:40Z"},{"alias_kind":"arxiv_version","alias_value":"2405.17125v1","created_at":"2026-07-05T08:23:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2405.17125","created_at":"2026-07-05T08:23:40Z"},{"alias_kind":"pith_short_12","alias_value":"UBPWERQHL6CE","created_at":"2026-07-05T08:23:40Z"},{"alias_kind":"pith_short_16","alias_value":"UBPWERQHL6CEQMUN","created_at":"2026-07-05T08:23:40Z"},{"alias_kind":"pith_short_8","alias_value":"UBPWERQH","created_at":"2026-07-05T08:23:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:UBPWERQHL6CEQMUNP3NGCZD7R7","target":"record","payload":{"canonical_record":{"source":{"id":"2405.17125","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2024-05-27T12:43:07Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"43046d8d09f486d2d31dec28d03122f7b3aff8f85bc08ea3461b64f1a7f59e92","abstract_canon_sha256":"504fef114b23f5eb17f554cf7902c4d334f945ac1bfcc7372b51e4085b15802e"},"schema_version":"1.0"},"canonical_sha256":"a05f6246075f8448328d7eda61647f8ff6a3fc57d8ad116d46ca535908f9d957","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:23:40.284998Z","signature_b64":"OchlnlGQZRmI0EwzZST9AN/iK0rWyFIZzYdzRpyexR9fjOoT68fiBJqcJLXIxkkMIr+HA8F8tgjaivomD6vUDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a05f6246075f8448328d7eda61647f8ff6a3fc57d8ad116d46ca535908f9d957","last_reissued_at":"2026-07-05T08:23:40.284496Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:23:40.284496Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2405.17125","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":"2026-07-05T08:23:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NJciOISHbrbKeU55EAfmI4qvKaKr3jIW4As7nPNoVAp/ditbHdeqtF2Z01XFqxxQhUQDO0M3y3oI/Z+UZcLGDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-20T06:36:16.197490Z"},"content_sha256":"46d0652ef20325fb40ae47fb07447088ad535fe6e67e9cc68348e19d870774f5","schema_version":"1.0","event_id":"sha256:46d0652ef20325fb40ae47fb07447088ad535fe6e67e9cc68348e19d870774f5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:UBPWERQHL6CEQMUNP3NGCZD7R7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Strategies to enhance THz harmonic generation combining multilayered, gated, and metamaterial-based architectures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.app-ph"],"primary_cat":"physics.optics","authors_text":"Ali Maleki, Georg Herink, Jean-Michel M\\'enard, Moritz B. Heindl, Robert W. Boyd, Yongbao Xin","submitted_at":"2024-05-27T12:43:07Z","abstract_excerpt":"Graphene has unique properties paving the way for groundbreaking future applications. Its large optical nonlinearity and ease of integration in devices notably makes it an ideal candidate to become a key component for all-optical switching and frequency conversion applications. In the terahertz (THz) region, various approaches have been independently demonstrated to optimize the nonlinear effects in graphene, addressing a critical limitation arising from the atomically thin interaction length. Here, we demonstrate sample architectures that combine strategies to enhance THz nonlinearities in gr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2405.17125","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/2405.17125/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":"2026-07-05T08:23:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q68KMGaYBpogVgG/aiUH6VfB30Yu4AMjbXhMsPfqgOJzVElhsdB2mEmafa9kJyuVJO9esJhJDb9NH5DTSTWWBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-20T06:36:16.197867Z"},"content_sha256":"1dff548d134109a2bc9cceb47aacbf9882b2484bf853d27c501fe899cf512db5","schema_version":"1.0","event_id":"sha256:1dff548d134109a2bc9cceb47aacbf9882b2484bf853d27c501fe899cf512db5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UBPWERQHL6CEQMUNP3NGCZD7R7/bundle.json","state_url":"https://pith.science/pith/UBPWERQHL6CEQMUNP3NGCZD7R7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UBPWERQHL6CEQMUNP3NGCZD7R7/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":"2026-07-20T06:36:16Z","links":{"resolver":"https://pith.science/pith/UBPWERQHL6CEQMUNP3NGCZD7R7","bundle":"https://pith.science/pith/UBPWERQHL6CEQMUNP3NGCZD7R7/bundle.json","state":"https://pith.science/pith/UBPWERQHL6CEQMUNP3NGCZD7R7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UBPWERQHL6CEQMUNP3NGCZD7R7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:UBPWERQHL6CEQMUNP3NGCZD7R7","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":"504fef114b23f5eb17f554cf7902c4d334f945ac1bfcc7372b51e4085b15802e","cross_cats_sorted":["physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2024-05-27T12:43:07Z","title_canon_sha256":"43046d8d09f486d2d31dec28d03122f7b3aff8f85bc08ea3461b64f1a7f59e92"},"schema_version":"1.0","source":{"id":"2405.17125","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2405.17125","created_at":"2026-07-05T08:23:40Z"},{"alias_kind":"arxiv_version","alias_value":"2405.17125v1","created_at":"2026-07-05T08:23:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2405.17125","created_at":"2026-07-05T08:23:40Z"},{"alias_kind":"pith_short_12","alias_value":"UBPWERQHL6CE","created_at":"2026-07-05T08:23:40Z"},{"alias_kind":"pith_short_16","alias_value":"UBPWERQHL6CEQMUN","created_at":"2026-07-05T08:23:40Z"},{"alias_kind":"pith_short_8","alias_value":"UBPWERQH","created_at":"2026-07-05T08:23:40Z"}],"graph_snapshots":[{"event_id":"sha256:1dff548d134109a2bc9cceb47aacbf9882b2484bf853d27c501fe899cf512db5","target":"graph","created_at":"2026-07-05T08:23:40Z","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/2405.17125/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Graphene has unique properties paving the way for groundbreaking future applications. Its large optical nonlinearity and ease of integration in devices notably makes it an ideal candidate to become a key component for all-optical switching and frequency conversion applications. In the terahertz (THz) region, various approaches have been independently demonstrated to optimize the nonlinear effects in graphene, addressing a critical limitation arising from the atomically thin interaction length. Here, we demonstrate sample architectures that combine strategies to enhance THz nonlinearities in gr","authors_text":"Ali Maleki, Georg Herink, Jean-Michel M\\'enard, Moritz B. Heindl, Robert W. Boyd, Yongbao Xin","cross_cats":["physics.app-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2024-05-27T12:43:07Z","title":"Strategies to enhance THz harmonic generation combining multilayered, gated, and metamaterial-based architectures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2405.17125","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":"sha256:46d0652ef20325fb40ae47fb07447088ad535fe6e67e9cc68348e19d870774f5","target":"record","created_at":"2026-07-05T08:23:40Z","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":"504fef114b23f5eb17f554cf7902c4d334f945ac1bfcc7372b51e4085b15802e","cross_cats_sorted":["physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2024-05-27T12:43:07Z","title_canon_sha256":"43046d8d09f486d2d31dec28d03122f7b3aff8f85bc08ea3461b64f1a7f59e92"},"schema_version":"1.0","source":{"id":"2405.17125","kind":"arxiv","version":1}},"canonical_sha256":"a05f6246075f8448328d7eda61647f8ff6a3fc57d8ad116d46ca535908f9d957","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a05f6246075f8448328d7eda61647f8ff6a3fc57d8ad116d46ca535908f9d957","first_computed_at":"2026-07-05T08:23:40.284496Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:23:40.284496Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OchlnlGQZRmI0EwzZST9AN/iK0rWyFIZzYdzRpyexR9fjOoT68fiBJqcJLXIxkkMIr+HA8F8tgjaivomD6vUDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T08:23:40.284998Z","signed_message":"canonical_sha256_bytes"},"source_id":"2405.17125","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:46d0652ef20325fb40ae47fb07447088ad535fe6e67e9cc68348e19d870774f5","sha256:1dff548d134109a2bc9cceb47aacbf9882b2484bf853d27c501fe899cf512db5"],"state_sha256":"9b39d7d4263364487b12afcea6fa039a5985859eeb67da2b0281d6af0cb64205"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KbDHb7LbeIL2L3ojqEPwBjvFUuyatuOBSrUyIVEUbMHYC/eoWTE2lUSpbBWoL4LcnldKoO51kUnQi52JzxHLDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-20T06:36:16.200578Z","bundle_sha256":"717a6cd10148ceaf9711440555569c2b457ab36a195ade40d91be7cd2e6733d5"}}