{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:FIKSI2LOY5PRRCVB33UMNB4ZNN","short_pith_number":"pith:FIKSI2LO","canonical_record":{"source":{"id":"1807.09648","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-07-11T04:42:35Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"1f82941eda7277ec160ec4f74d1bf9ba326e020e46ffde24504b8069e736238c","abstract_canon_sha256":"b72356120cc4fa09bb1d485a096247279358555352ce26612caaa1b104415155"},"schema_version":"1.0"},"canonical_sha256":"2a1524696ec75f188aa1dee8c687996b478ec5602076d2e1780333256e4c432a","source":{"kind":"arxiv","id":"1807.09648","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.09648","created_at":"2026-05-18T00:09:50Z"},{"alias_kind":"arxiv_version","alias_value":"1807.09648v1","created_at":"2026-05-18T00:09:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.09648","created_at":"2026-05-18T00:09:50Z"},{"alias_kind":"pith_short_12","alias_value":"FIKSI2LOY5PR","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"FIKSI2LOY5PRRCVB","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"FIKSI2LO","created_at":"2026-05-18T12:32:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:FIKSI2LOY5PRRCVB33UMNB4ZNN","target":"record","payload":{"canonical_record":{"source":{"id":"1807.09648","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-07-11T04:42:35Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"1f82941eda7277ec160ec4f74d1bf9ba326e020e46ffde24504b8069e736238c","abstract_canon_sha256":"b72356120cc4fa09bb1d485a096247279358555352ce26612caaa1b104415155"},"schema_version":"1.0"},"canonical_sha256":"2a1524696ec75f188aa1dee8c687996b478ec5602076d2e1780333256e4c432a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:09:50.714666Z","signature_b64":"+1zJ2m19r3fhCPGgfIKjVkDnarT7TD5LS9iCGI3OWq7rcjtL2Z9J0aToXhdI1t4eiSEYR+VOHl3gfMmC+sSDAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2a1524696ec75f188aa1dee8c687996b478ec5602076d2e1780333256e4c432a","last_reissued_at":"2026-05-18T00:09:50.714136Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:09:50.714136Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.09648","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":"2026-05-18T00:09:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IQN1hVDx1m5t7CtaUfdNZGL/hpIs99lqjUPK1OGBo3Jig2N/+M2p/eORRpztprPEbHGXoXc/otz/z6TiJOHxDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T06:08:02.583725Z"},"content_sha256":"6f357540c9f81b6d7dda15cda22ea6d867074256ee2ee9948f9cff399d7413e8","schema_version":"1.0","event_id":"sha256:6f357540c9f81b6d7dda15cda22ea6d867074256ee2ee9948f9cff399d7413e8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:FIKSI2LOY5PRRCVB33UMNB4ZNN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectrally-tunable Dielectric Grating-based Metasurface for Broadband Planar Light Concentration","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"physics.app-ph","authors_text":"Ameen Elikkottil, Bala Pesala, Mohammed H Tahersima, MVN Surendra Gupta, Rishi Maiti, Volker J. Sorger","submitted_at":"2018-07-11T04:42:35Z","abstract_excerpt":"The energy consumption of buildings is increasing at a rapid pace due to urbanization, while net-zero energy buildings powered by renewable sources offer a green and sustainable solution. However, the limited rooftop space available on skyscrapers and multi-story buildings poses a challenge for large-scale integration of solar photovoltaic modules. Conventional photovoltaics solutions such as silicon solar panels block the visible light from entering the building rending them unfeasible to cover all building surfaces. Here, we demonstrate a novel dielectric metasurface (based-on silicon nitrid"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.09648","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":"2026-05-18T00:09:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Dfes+JUjD+mToCV/87Cu8vdXU1YvNTCYwPtakepFnOLzwyhcfApxJRuADulfFfDZQlLoDxNhn8XnZL0eKQRhCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T06:08:02.584396Z"},"content_sha256":"8911910d35847b048b9660d240f8f15e8889a8e49e07723ab5d82e28d25f5e09","schema_version":"1.0","event_id":"sha256:8911910d35847b048b9660d240f8f15e8889a8e49e07723ab5d82e28d25f5e09"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FIKSI2LOY5PRRCVB33UMNB4ZNN/bundle.json","state_url":"https://pith.science/pith/FIKSI2LOY5PRRCVB33UMNB4ZNN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FIKSI2LOY5PRRCVB33UMNB4ZNN/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":"2026-05-30T06:08:02Z","links":{"resolver":"https://pith.science/pith/FIKSI2LOY5PRRCVB33UMNB4ZNN","bundle":"https://pith.science/pith/FIKSI2LOY5PRRCVB33UMNB4ZNN/bundle.json","state":"https://pith.science/pith/FIKSI2LOY5PRRCVB33UMNB4ZNN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FIKSI2LOY5PRRCVB33UMNB4ZNN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:FIKSI2LOY5PRRCVB33UMNB4ZNN","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":"b72356120cc4fa09bb1d485a096247279358555352ce26612caaa1b104415155","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-07-11T04:42:35Z","title_canon_sha256":"1f82941eda7277ec160ec4f74d1bf9ba326e020e46ffde24504b8069e736238c"},"schema_version":"1.0","source":{"id":"1807.09648","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.09648","created_at":"2026-05-18T00:09:50Z"},{"alias_kind":"arxiv_version","alias_value":"1807.09648v1","created_at":"2026-05-18T00:09:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.09648","created_at":"2026-05-18T00:09:50Z"},{"alias_kind":"pith_short_12","alias_value":"FIKSI2LOY5PR","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"FIKSI2LOY5PRRCVB","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"FIKSI2LO","created_at":"2026-05-18T12:32:22Z"}],"graph_snapshots":[{"event_id":"sha256:8911910d35847b048b9660d240f8f15e8889a8e49e07723ab5d82e28d25f5e09","target":"graph","created_at":"2026-05-18T00:09:50Z","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":"The energy consumption of buildings is increasing at a rapid pace due to urbanization, while net-zero energy buildings powered by renewable sources offer a green and sustainable solution. However, the limited rooftop space available on skyscrapers and multi-story buildings poses a challenge for large-scale integration of solar photovoltaic modules. Conventional photovoltaics solutions such as silicon solar panels block the visible light from entering the building rending them unfeasible to cover all building surfaces. Here, we demonstrate a novel dielectric metasurface (based-on silicon nitrid","authors_text":"Ameen Elikkottil, Bala Pesala, Mohammed H Tahersima, MVN Surendra Gupta, Rishi Maiti, Volker J. Sorger","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-07-11T04:42:35Z","title":"Spectrally-tunable Dielectric Grating-based Metasurface for Broadband Planar Light Concentration"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.09648","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":"sha256:6f357540c9f81b6d7dda15cda22ea6d867074256ee2ee9948f9cff399d7413e8","target":"record","created_at":"2026-05-18T00:09:50Z","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":"b72356120cc4fa09bb1d485a096247279358555352ce26612caaa1b104415155","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-07-11T04:42:35Z","title_canon_sha256":"1f82941eda7277ec160ec4f74d1bf9ba326e020e46ffde24504b8069e736238c"},"schema_version":"1.0","source":{"id":"1807.09648","kind":"arxiv","version":1}},"canonical_sha256":"2a1524696ec75f188aa1dee8c687996b478ec5602076d2e1780333256e4c432a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2a1524696ec75f188aa1dee8c687996b478ec5602076d2e1780333256e4c432a","first_computed_at":"2026-05-18T00:09:50.714136Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:50.714136Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+1zJ2m19r3fhCPGgfIKjVkDnarT7TD5LS9iCGI3OWq7rcjtL2Z9J0aToXhdI1t4eiSEYR+VOHl3gfMmC+sSDAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:50.714666Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.09648","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6f357540c9f81b6d7dda15cda22ea6d867074256ee2ee9948f9cff399d7413e8","sha256:8911910d35847b048b9660d240f8f15e8889a8e49e07723ab5d82e28d25f5e09"],"state_sha256":"5c10e3be5806781e71a5be637f2fd399c7e54882523a03dcc4adf723e748eda3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Hr3UqegqGPr6QAC9GOgRmT2afxoF6G5urtw91G6oiOx2lNbt6o+G6XjVJyrkB9YTTQl60I0qp2K8jYMTgRC+Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T06:08:02.587556Z","bundle_sha256":"41885019a6fe7c42b2a05fd3b380aaf1fd76ffa90085cf518d3713d49892978b"}}