{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:DPKXH6ZUIEXOWOB6W6G6XRO3GU","short_pith_number":"pith:DPKXH6ZU","canonical_record":{"source":{"id":"2107.09659","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-07-20T17:45:52Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"023046eeac5a2d9c93635eb54e5bc3191338ddcfe28d7630eadd5d0cad06c27a","abstract_canon_sha256":"94cceafd27a7542680268d5dafdae8e09511db85a1af591306dbbd90531c4fb1"},"schema_version":"1.0"},"canonical_sha256":"1bd573fb34412eeb383eb78debc5db35202ce06e10710d7da2e90c113d6344a4","source":{"kind":"arxiv","id":"2107.09659","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.09659","created_at":"2026-07-05T03:24:44Z"},{"alias_kind":"arxiv_version","alias_value":"2107.09659v1","created_at":"2026-07-05T03:24:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.09659","created_at":"2026-07-05T03:24:44Z"},{"alias_kind":"pith_short_12","alias_value":"DPKXH6ZUIEXO","created_at":"2026-07-05T03:24:44Z"},{"alias_kind":"pith_short_16","alias_value":"DPKXH6ZUIEXOWOB6","created_at":"2026-07-05T03:24:44Z"},{"alias_kind":"pith_short_8","alias_value":"DPKXH6ZU","created_at":"2026-07-05T03:24:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:DPKXH6ZUIEXOWOB6W6G6XRO3GU","target":"record","payload":{"canonical_record":{"source":{"id":"2107.09659","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-07-20T17:45:52Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"023046eeac5a2d9c93635eb54e5bc3191338ddcfe28d7630eadd5d0cad06c27a","abstract_canon_sha256":"94cceafd27a7542680268d5dafdae8e09511db85a1af591306dbbd90531c4fb1"},"schema_version":"1.0"},"canonical_sha256":"1bd573fb34412eeb383eb78debc5db35202ce06e10710d7da2e90c113d6344a4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:24:44.329955Z","signature_b64":"vEktNF+O+gstSp8wguZztO4TxqEgXX+mOmpkwvirpeSkE5gMr2YzzSlTGYfzYHFQnahxpwvv2vrjp7/OUXW4DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1bd573fb34412eeb383eb78debc5db35202ce06e10710d7da2e90c113d6344a4","last_reissued_at":"2026-07-05T03:24:44.329499Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:24:44.329499Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.09659","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":"2026-07-05T03:24:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L55ft5MEjNa+mfq+J5b5tQAf0TVPU89V2qIXaFjh2ejIxBEEupaFhUgBy8Hu5VSiOggZm6zO+FxmatkGMwnrBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T07:57:33.709935Z"},"content_sha256":"2e6b4fd9d8d0a9dd649b5b0d4a257a1e4f2652f2a901ba4542991cfd111deeeb","schema_version":"1.0","event_id":"sha256:2e6b4fd9d8d0a9dd649b5b0d4a257a1e4f2652f2a901ba4542991cfd111deeeb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:DPKXH6ZUIEXOWOB6W6G6XRO3GU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On-chip optical levitation with a metalens in vacuum","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.app-ph"],"primary_cat":"physics.optics","authors_text":"Jonghoon Ahn, Kunhong Shen, Lidan Zhang, Peng Ju, Tongcang Li, Xi Chen, Xingjie Ni, Yao Duan, Zhujing Xu","submitted_at":"2021-07-20T17:45:52Z","abstract_excerpt":"Optical levitation of dielectric particles in vacuum is a powerful technique for precision measurements, testing fundamental physics, and quantum information science. Conventional optical tweezers require bulky optical components for trapping and detection. Here we design and fabricate an ultrathin dielectric metalens with a high numerical aperture of 0.88 at 1064 nm in vacuum. It consists of 500 nm-thick silicon nano-antennas, which are compatible with ultrahigh vacuum. We demonstrate optical levitation of nanoparticles in vacuum with a single metalens. The trapping frequency can be tuned by "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.09659","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/2107.09659/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":"2026-07-05T03:24:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HHpfFDa8c/297yUUiKXh9x/LMDnpOFh58tlZXc3AYbLdbmEmSp3zCnLL8F12cQ0d9OCXvIP2sjtXg6Pp31nLAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T07:57:33.710955Z"},"content_sha256":"e2b9cfc4409530b96fdcdda7b34911fce05b41cfd934c324bbbfbdbad4af4e7a","schema_version":"1.0","event_id":"sha256:e2b9cfc4409530b96fdcdda7b34911fce05b41cfd934c324bbbfbdbad4af4e7a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DPKXH6ZUIEXOWOB6W6G6XRO3GU/bundle.json","state_url":"https://pith.science/pith/DPKXH6ZUIEXOWOB6W6G6XRO3GU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DPKXH6ZUIEXOWOB6W6G6XRO3GU/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":"2026-08-04T07:57:33Z","links":{"resolver":"https://pith.science/pith/DPKXH6ZUIEXOWOB6W6G6XRO3GU","bundle":"https://pith.science/pith/DPKXH6ZUIEXOWOB6W6G6XRO3GU/bundle.json","state":"https://pith.science/pith/DPKXH6ZUIEXOWOB6W6G6XRO3GU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DPKXH6ZUIEXOWOB6W6G6XRO3GU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:DPKXH6ZUIEXOWOB6W6G6XRO3GU","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":"94cceafd27a7542680268d5dafdae8e09511db85a1af591306dbbd90531c4fb1","cross_cats_sorted":["physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-07-20T17:45:52Z","title_canon_sha256":"023046eeac5a2d9c93635eb54e5bc3191338ddcfe28d7630eadd5d0cad06c27a"},"schema_version":"1.0","source":{"id":"2107.09659","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.09659","created_at":"2026-07-05T03:24:44Z"},{"alias_kind":"arxiv_version","alias_value":"2107.09659v1","created_at":"2026-07-05T03:24:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.09659","created_at":"2026-07-05T03:24:44Z"},{"alias_kind":"pith_short_12","alias_value":"DPKXH6ZUIEXO","created_at":"2026-07-05T03:24:44Z"},{"alias_kind":"pith_short_16","alias_value":"DPKXH6ZUIEXOWOB6","created_at":"2026-07-05T03:24:44Z"},{"alias_kind":"pith_short_8","alias_value":"DPKXH6ZU","created_at":"2026-07-05T03:24:44Z"}],"graph_snapshots":[{"event_id":"sha256:e2b9cfc4409530b96fdcdda7b34911fce05b41cfd934c324bbbfbdbad4af4e7a","target":"graph","created_at":"2026-07-05T03:24:44Z","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/2107.09659/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Optical levitation of dielectric particles in vacuum is a powerful technique for precision measurements, testing fundamental physics, and quantum information science. Conventional optical tweezers require bulky optical components for trapping and detection. Here we design and fabricate an ultrathin dielectric metalens with a high numerical aperture of 0.88 at 1064 nm in vacuum. It consists of 500 nm-thick silicon nano-antennas, which are compatible with ultrahigh vacuum. We demonstrate optical levitation of nanoparticles in vacuum with a single metalens. The trapping frequency can be tuned by ","authors_text":"Jonghoon Ahn, Kunhong Shen, Lidan Zhang, Peng Ju, Tongcang Li, Xi Chen, Xingjie Ni, Yao Duan, Zhujing Xu","cross_cats":["physics.app-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-07-20T17:45:52Z","title":"On-chip optical levitation with a metalens in vacuum"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.09659","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":"sha256:2e6b4fd9d8d0a9dd649b5b0d4a257a1e4f2652f2a901ba4542991cfd111deeeb","target":"record","created_at":"2026-07-05T03:24:44Z","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":"94cceafd27a7542680268d5dafdae8e09511db85a1af591306dbbd90531c4fb1","cross_cats_sorted":["physics.app-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2021-07-20T17:45:52Z","title_canon_sha256":"023046eeac5a2d9c93635eb54e5bc3191338ddcfe28d7630eadd5d0cad06c27a"},"schema_version":"1.0","source":{"id":"2107.09659","kind":"arxiv","version":1}},"canonical_sha256":"1bd573fb34412eeb383eb78debc5db35202ce06e10710d7da2e90c113d6344a4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1bd573fb34412eeb383eb78debc5db35202ce06e10710d7da2e90c113d6344a4","first_computed_at":"2026-07-05T03:24:44.329499Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:24:44.329499Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vEktNF+O+gstSp8wguZztO4TxqEgXX+mOmpkwvirpeSkE5gMr2YzzSlTGYfzYHFQnahxpwvv2vrjp7/OUXW4DA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:24:44.329955Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.09659","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2e6b4fd9d8d0a9dd649b5b0d4a257a1e4f2652f2a901ba4542991cfd111deeeb","sha256:e2b9cfc4409530b96fdcdda7b34911fce05b41cfd934c324bbbfbdbad4af4e7a"],"state_sha256":"fba92d885072f37732753f4d148f66861de21a56d67a485517535e7ebb49eea4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/S5rQ5u+DwRC6Jf8k2z+h9CQF2y8POpCFoqrJm7sQE/0U5p8nhEFx67/4HDWWnaUvFLVQY3w19YP8IzhKMS+Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T07:57:33.717731Z","bundle_sha256":"68e76d5739c7f58d4faf631529fa122854f30e1dc41f9028770aae133cab4752"}}