{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:TXGAZNWFDKG23VPM47HOXS7SKN","short_pith_number":"pith:TXGAZNWF","canonical_record":{"source":{"id":"1802.04854","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-13T20:53:30Z","cross_cats_sorted":[],"title_canon_sha256":"9006d03d6a12303ce9193d7c58a49da252b68cf63b74a351117af7fcb8fdbcb1","abstract_canon_sha256":"7e40309a7dc4a41e95ae22aee59acbca0715db91b457d6ced4fa0162622cc184"},"schema_version":"1.0"},"canonical_sha256":"9dcc0cb6c51a8dadd5ece7ceebcbf25350b9937a23feee38d2c2ba263b061615","source":{"kind":"arxiv","id":"1802.04854","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.04854","created_at":"2026-05-18T00:12:58Z"},{"alias_kind":"arxiv_version","alias_value":"1802.04854v2","created_at":"2026-05-18T00:12:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.04854","created_at":"2026-05-18T00:12:58Z"},{"alias_kind":"pith_short_12","alias_value":"TXGAZNWFDKG2","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"TXGAZNWFDKG23VPM","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"TXGAZNWF","created_at":"2026-05-18T12:32:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:TXGAZNWFDKG23VPM47HOXS7SKN","target":"record","payload":{"canonical_record":{"source":{"id":"1802.04854","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-13T20:53:30Z","cross_cats_sorted":[],"title_canon_sha256":"9006d03d6a12303ce9193d7c58a49da252b68cf63b74a351117af7fcb8fdbcb1","abstract_canon_sha256":"7e40309a7dc4a41e95ae22aee59acbca0715db91b457d6ced4fa0162622cc184"},"schema_version":"1.0"},"canonical_sha256":"9dcc0cb6c51a8dadd5ece7ceebcbf25350b9937a23feee38d2c2ba263b061615","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:12:58.540887Z","signature_b64":"tIfolEzZvi9TkLk3Kve7k6tjlSSF0aOxZ/g07KQ3VjZdp4jaM7xIxP4KllTfSe7oBX7+7G7n6qOXk3hdLxmABA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9dcc0cb6c51a8dadd5ece7ceebcbf25350b9937a23feee38d2c2ba263b061615","last_reissued_at":"2026-05-18T00:12:58.540325Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:12:58.540325Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.04854","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":"2026-05-18T00:12:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DA1hF8RIE0SjzOzXqudZZXXgQUL66f+gRfZJ0BJNcV2r4kRp9O/Hu1zWf87WufCvj5mdroOKsJFhtaoELZmgDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:53:52.571644Z"},"content_sha256":"8e5296d0b722b998142571f5110cf73ccc1c4dfe6f91f3e3b5eb4972ca9b7af0","schema_version":"1.0","event_id":"sha256:8e5296d0b722b998142571f5110cf73ccc1c4dfe6f91f3e3b5eb4972ca9b7af0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:TXGAZNWFDKG23VPM47HOXS7SKN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stacked Wafer Gradient Index Silicon Optics with Integral Anti-reflection Layers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"C. Jung-Kubiak, E. C. Tong, E. Padilla, F. Defrance, G. Chattopadhyay, H. Yoshida, J. Connors, J. Sayers, M. I. Hollister, S. Golwala, S. Radford","submitted_at":"2018-02-13T20:53:30Z","abstract_excerpt":"Silicon optics with wide bandwidth anti-reflection (AR) coatings, made of multi-layer textured silicon surfaces, are developed for millimeter and submillimeter wavelengths. Single and double layer AR coatings were designed for an optimal transmission centered on 250 GHz, and fabricated using the DRIE (Deep Reaction Ion Etching) technique. Tests of high resistivity silicon wafers with single-layer coatings between 75 GHz and 330 GHz are presented and compared with the simulations."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.04854","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":""},"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":"2026-05-18T00:12:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lJ8Tbky4AxHhOS2Oo77iSI2xvcF1cCRTIyzyw2GG4lMhKFle5ezhr2rYp+2ypeYfHhuWJ/WhLIFMHrES+7lLAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:53:52.572281Z"},"content_sha256":"078fb6b3159cf9db73724e74651fdbd59b20daef4af3eea6cea4ebaae2e19475","schema_version":"1.0","event_id":"sha256:078fb6b3159cf9db73724e74651fdbd59b20daef4af3eea6cea4ebaae2e19475"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TXGAZNWFDKG23VPM47HOXS7SKN/bundle.json","state_url":"https://pith.science/pith/TXGAZNWFDKG23VPM47HOXS7SKN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TXGAZNWFDKG23VPM47HOXS7SKN/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":"2026-05-27T16:53:52Z","links":{"resolver":"https://pith.science/pith/TXGAZNWFDKG23VPM47HOXS7SKN","bundle":"https://pith.science/pith/TXGAZNWFDKG23VPM47HOXS7SKN/bundle.json","state":"https://pith.science/pith/TXGAZNWFDKG23VPM47HOXS7SKN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TXGAZNWFDKG23VPM47HOXS7SKN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:TXGAZNWFDKG23VPM47HOXS7SKN","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":"7e40309a7dc4a41e95ae22aee59acbca0715db91b457d6ced4fa0162622cc184","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-13T20:53:30Z","title_canon_sha256":"9006d03d6a12303ce9193d7c58a49da252b68cf63b74a351117af7fcb8fdbcb1"},"schema_version":"1.0","source":{"id":"1802.04854","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.04854","created_at":"2026-05-18T00:12:58Z"},{"alias_kind":"arxiv_version","alias_value":"1802.04854v2","created_at":"2026-05-18T00:12:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.04854","created_at":"2026-05-18T00:12:58Z"},{"alias_kind":"pith_short_12","alias_value":"TXGAZNWFDKG2","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"TXGAZNWFDKG23VPM","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"TXGAZNWF","created_at":"2026-05-18T12:32:56Z"}],"graph_snapshots":[{"event_id":"sha256:078fb6b3159cf9db73724e74651fdbd59b20daef4af3eea6cea4ebaae2e19475","target":"graph","created_at":"2026-05-18T00:12:58Z","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":"Silicon optics with wide bandwidth anti-reflection (AR) coatings, made of multi-layer textured silicon surfaces, are developed for millimeter and submillimeter wavelengths. Single and double layer AR coatings were designed for an optimal transmission centered on 250 GHz, and fabricated using the DRIE (Deep Reaction Ion Etching) technique. Tests of high resistivity silicon wafers with single-layer coatings between 75 GHz and 330 GHz are presented and compared with the simulations.","authors_text":"C. Jung-Kubiak, E. C. Tong, E. Padilla, F. Defrance, G. Chattopadhyay, H. Yoshida, J. Connors, J. Sayers, M. I. Hollister, S. Golwala, S. Radford","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-13T20:53:30Z","title":"Stacked Wafer Gradient Index Silicon Optics with Integral Anti-reflection Layers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.04854","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":"sha256:8e5296d0b722b998142571f5110cf73ccc1c4dfe6f91f3e3b5eb4972ca9b7af0","target":"record","created_at":"2026-05-18T00:12:58Z","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":"7e40309a7dc4a41e95ae22aee59acbca0715db91b457d6ced4fa0162622cc184","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-13T20:53:30Z","title_canon_sha256":"9006d03d6a12303ce9193d7c58a49da252b68cf63b74a351117af7fcb8fdbcb1"},"schema_version":"1.0","source":{"id":"1802.04854","kind":"arxiv","version":2}},"canonical_sha256":"9dcc0cb6c51a8dadd5ece7ceebcbf25350b9937a23feee38d2c2ba263b061615","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9dcc0cb6c51a8dadd5ece7ceebcbf25350b9937a23feee38d2c2ba263b061615","first_computed_at":"2026-05-18T00:12:58.540325Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:12:58.540325Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tIfolEzZvi9TkLk3Kve7k6tjlSSF0aOxZ/g07KQ3VjZdp4jaM7xIxP4KllTfSe7oBX7+7G7n6qOXk3hdLxmABA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:12:58.540887Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.04854","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e5296d0b722b998142571f5110cf73ccc1c4dfe6f91f3e3b5eb4972ca9b7af0","sha256:078fb6b3159cf9db73724e74651fdbd59b20daef4af3eea6cea4ebaae2e19475"],"state_sha256":"db2d4ea7369f5a4b4ce8560c8ec2ffea759735cdfadbaee128e5cb9e65f6acba"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NcznM86YQLt/v4o8Haxyq6SMIfljjYe2M0vp4Jy4CFQAIyLIDFenR0R6xndMPI1EZW4vGm3mfGIQL6agho+/AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T16:53:52.575459Z","bundle_sha256":"3bbc190fa569a5dd3d94dd987e4db811ffd79eb8f970a60123494e400c654bd1"}}