{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:2ZQT2AT2U6KFAYQL4CNCAJN3AF","short_pith_number":"pith:2ZQT2AT2","canonical_record":{"source":{"id":"1903.09077","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2019-03-21T15:57:17Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"63a4530d2249eb40b626def3f67bc29c11ef827465d8363e68d223463904d76c","abstract_canon_sha256":"2372e0026c543dcb327bae025755a0ff544343dc0472e403d9ac1ae089ec96e1"},"schema_version":"1.0"},"canonical_sha256":"d6613d027aa79450620be09a2025bb016a756af494405cb8f029f3ade73cc73e","source":{"kind":"arxiv","id":"1903.09077","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.09077","created_at":"2026-05-17T23:50:43Z"},{"alias_kind":"arxiv_version","alias_value":"1903.09077v1","created_at":"2026-05-17T23:50:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.09077","created_at":"2026-05-17T23:50:43Z"},{"alias_kind":"pith_short_12","alias_value":"2ZQT2AT2U6KF","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"2ZQT2AT2U6KFAYQL","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"2ZQT2AT2","created_at":"2026-05-18T12:33:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:2ZQT2AT2U6KFAYQL4CNCAJN3AF","target":"record","payload":{"canonical_record":{"source":{"id":"1903.09077","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2019-03-21T15:57:17Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"63a4530d2249eb40b626def3f67bc29c11ef827465d8363e68d223463904d76c","abstract_canon_sha256":"2372e0026c543dcb327bae025755a0ff544343dc0472e403d9ac1ae089ec96e1"},"schema_version":"1.0"},"canonical_sha256":"d6613d027aa79450620be09a2025bb016a756af494405cb8f029f3ade73cc73e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:43.252772Z","signature_b64":"mnTwUuwwYJbrC1JSTyz3EQl1IcuC4zBzVlQnFBzOWZodTMWMxcWZ0z2pnNyya2VlG7VjaUtvccrBFCiABBGjDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d6613d027aa79450620be09a2025bb016a756af494405cb8f029f3ade73cc73e","last_reissued_at":"2026-05-17T23:50:43.252415Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:43.252415Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.09077","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":"2026-05-17T23:50:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aM39ERR46fI9cqM++NPp1DcV0a9jOwqCzNttee1lq/j8LYVMszNKtBSMW+IJnACV3Gpww/6WlA2t9DC40JqbAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T00:18:04.628818Z"},"content_sha256":"21a4c997b3e5ddbe0882b489d7470459f393b3ce036e566a87c5727878874cb3","schema_version":"1.0","event_id":"sha256:21a4c997b3e5ddbe0882b489d7470459f393b3ce036e566a87c5727878874cb3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:2ZQT2AT2U6KFAYQL4CNCAJN3AF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Self-stabilizing laser sails based on optical metasurfaces","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"physics.optics","authors_text":"Anthony Wang, Joel Siegel, Mikhail A. Kats, Min Seok Jang, Sergey G. Menabde, Victor Watson Brar","submitted_at":"2019-03-21T15:57:17Z","abstract_excerpt":"This article investigates the stability of 'laser sail'-style spacecraft constructed from dielectric metasurfaces with areal densities $<$1g/m$^2$. We show that the microscopic optical forces exerted on a metasurface by a high power laser (100 GW) can be engineered to achieve passive self-stabilization, such that it is optically trapped inside the drive beam, and self-corrects against angular and lateral perturbations. The metasurfaces we study consist of a patchwork of beam-steering elements that reflect light at different angles and efficiencies. These properties are varied for each element "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.09077","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":""},"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":"2026-05-17T23:50:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J122U6zNSgz0oa/j1jZS4ij7BBit9cGLF/TeMtpsHVMEjeHdWBhi35y8j7V9A4cBYjZeu6ZThNxfNHf6FMiaCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T00:18:04.629506Z"},"content_sha256":"eddeca0204c14c8d507bc7714090ce38e47fc29997bb3b97ed43f2b9ca9cd052","schema_version":"1.0","event_id":"sha256:eddeca0204c14c8d507bc7714090ce38e47fc29997bb3b97ed43f2b9ca9cd052"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2ZQT2AT2U6KFAYQL4CNCAJN3AF/bundle.json","state_url":"https://pith.science/pith/2ZQT2AT2U6KFAYQL4CNCAJN3AF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2ZQT2AT2U6KFAYQL4CNCAJN3AF/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":"2026-06-05T00:18:04Z","links":{"resolver":"https://pith.science/pith/2ZQT2AT2U6KFAYQL4CNCAJN3AF","bundle":"https://pith.science/pith/2ZQT2AT2U6KFAYQL4CNCAJN3AF/bundle.json","state":"https://pith.science/pith/2ZQT2AT2U6KFAYQL4CNCAJN3AF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2ZQT2AT2U6KFAYQL4CNCAJN3AF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:2ZQT2AT2U6KFAYQL4CNCAJN3AF","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":"2372e0026c543dcb327bae025755a0ff544343dc0472e403d9ac1ae089ec96e1","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2019-03-21T15:57:17Z","title_canon_sha256":"63a4530d2249eb40b626def3f67bc29c11ef827465d8363e68d223463904d76c"},"schema_version":"1.0","source":{"id":"1903.09077","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.09077","created_at":"2026-05-17T23:50:43Z"},{"alias_kind":"arxiv_version","alias_value":"1903.09077v1","created_at":"2026-05-17T23:50:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.09077","created_at":"2026-05-17T23:50:43Z"},{"alias_kind":"pith_short_12","alias_value":"2ZQT2AT2U6KF","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"2ZQT2AT2U6KFAYQL","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"2ZQT2AT2","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:eddeca0204c14c8d507bc7714090ce38e47fc29997bb3b97ed43f2b9ca9cd052","target":"graph","created_at":"2026-05-17T23:50:43Z","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":"This article investigates the stability of 'laser sail'-style spacecraft constructed from dielectric metasurfaces with areal densities $<$1g/m$^2$. We show that the microscopic optical forces exerted on a metasurface by a high power laser (100 GW) can be engineered to achieve passive self-stabilization, such that it is optically trapped inside the drive beam, and self-corrects against angular and lateral perturbations. The metasurfaces we study consist of a patchwork of beam-steering elements that reflect light at different angles and efficiencies. These properties are varied for each element ","authors_text":"Anthony Wang, Joel Siegel, Mikhail A. Kats, Min Seok Jang, Sergey G. Menabde, Victor Watson Brar","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2019-03-21T15:57:17Z","title":"Self-stabilizing laser sails based on optical metasurfaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.09077","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":"sha256:21a4c997b3e5ddbe0882b489d7470459f393b3ce036e566a87c5727878874cb3","target":"record","created_at":"2026-05-17T23:50:43Z","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":"2372e0026c543dcb327bae025755a0ff544343dc0472e403d9ac1ae089ec96e1","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.optics","submitted_at":"2019-03-21T15:57:17Z","title_canon_sha256":"63a4530d2249eb40b626def3f67bc29c11ef827465d8363e68d223463904d76c"},"schema_version":"1.0","source":{"id":"1903.09077","kind":"arxiv","version":1}},"canonical_sha256":"d6613d027aa79450620be09a2025bb016a756af494405cb8f029f3ade73cc73e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d6613d027aa79450620be09a2025bb016a756af494405cb8f029f3ade73cc73e","first_computed_at":"2026-05-17T23:50:43.252415Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:50:43.252415Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mnTwUuwwYJbrC1JSTyz3EQl1IcuC4zBzVlQnFBzOWZodTMWMxcWZ0z2pnNyya2VlG7VjaUtvccrBFCiABBGjDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:50:43.252772Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.09077","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:21a4c997b3e5ddbe0882b489d7470459f393b3ce036e566a87c5727878874cb3","sha256:eddeca0204c14c8d507bc7714090ce38e47fc29997bb3b97ed43f2b9ca9cd052"],"state_sha256":"1bbef0fe388afe787b576be96a9e189adefede605b52ed3931390ff9887d3998"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CllPYBhBGb/cJd+IJfkNsYkLvmNqXMMaK9P5yYpq2z4ZuAPnZ4WoDBtaoJymxO+/H2GG5DB5bwwikmBPMWTDBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T00:18:04.632972Z","bundle_sha256":"07f09760c9c551ac84cb63076308821f860b60727547ca2f6fdacdf8f99a52b1"}}