{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:ARK5EFYA2PLRNGFQ3E56CDOGJR","short_pith_number":"pith:ARK5EFYA","schema_version":"1.0","canonical_sha256":"0455d21700d3d71698b0d93be10dc64c4d4b080c5a5e478792a4e2ebdcc7f608","source":{"kind":"arxiv","id":"1208.6046","version":2},"attestation_state":"computed","paper":{"title":"Theoretical and experimental evaluation of multilayer porous silicon structures for enhanced erbium up-conversion luminescence","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Craig M. Johnson, Gavin J. Conibeer, Peter J. Reece","submitted_at":"2012-08-29T22:39:13Z","abstract_excerpt":"The enhancement of Er$^{3+}$-based up-conversion for photovoltaics in multilayer porous silicon photonic structures is considered theoretically and experimentally. Transfer matrix simulations are used to assess the increased photonic density of states that results from the slowing of energy propagation at the short-wavelength edge of one-dimensional photonic band gaps. An indirect calculation of Er$^{3+}$ absorption enhancement within slow-light modes is then used to illustrate an increase in absorption over the bulk value: the effective absorption coefficient is shown to increase by more than"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1208.6046","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-08-29T22:39:13Z","cross_cats_sorted":[],"title_canon_sha256":"649594335aae9e52d12871cb1eb44ace35aaac247ea4f5632477886df323b685","abstract_canon_sha256":"03c1a3cc912b82a7aaa801cc1b4ad529551916ab69728044ac02742f133776bc"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:46:16.334488Z","signature_b64":"DlxiUve69hugFtfAybWvU7h0oeFFnRTBOxbxHoW0cEHIgYFlu0PF4sLaIAcRKJ6zgZqBtcPkzQDV+xZ9iabaAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0455d21700d3d71698b0d93be10dc64c4d4b080c5a5e478792a4e2ebdcc7f608","last_reissued_at":"2026-05-18T03:46:16.333743Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:46:16.333743Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Theoretical and experimental evaluation of multilayer porous silicon structures for enhanced erbium up-conversion luminescence","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Craig M. Johnson, Gavin J. Conibeer, Peter J. Reece","submitted_at":"2012-08-29T22:39:13Z","abstract_excerpt":"The enhancement of Er$^{3+}$-based up-conversion for photovoltaics in multilayer porous silicon photonic structures is considered theoretically and experimentally. Transfer matrix simulations are used to assess the increased photonic density of states that results from the slowing of energy propagation at the short-wavelength edge of one-dimensional photonic band gaps. An indirect calculation of Er$^{3+}$ absorption enhancement within slow-light modes is then used to illustrate an increase in absorption over the bulk value: the effective absorption coefficient is shown to increase by more than"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.6046","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1208.6046","created_at":"2026-05-18T03:46:16.333883+00:00"},{"alias_kind":"arxiv_version","alias_value":"1208.6046v2","created_at":"2026-05-18T03:46:16.333883+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.6046","created_at":"2026-05-18T03:46:16.333883+00:00"},{"alias_kind":"pith_short_12","alias_value":"ARK5EFYA2PLR","created_at":"2026-05-18T12:26:58.693483+00:00"},{"alias_kind":"pith_short_16","alias_value":"ARK5EFYA2PLRNGFQ","created_at":"2026-05-18T12:26:58.693483+00:00"},{"alias_kind":"pith_short_8","alias_value":"ARK5EFYA","created_at":"2026-05-18T12:26:58.693483+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/ARK5EFYA2PLRNGFQ3E56CDOGJR","json":"https://pith.science/pith/ARK5EFYA2PLRNGFQ3E56CDOGJR.json","graph_json":"https://pith.science/api/pith-number/ARK5EFYA2PLRNGFQ3E56CDOGJR/graph.json","events_json":"https://pith.science/api/pith-number/ARK5EFYA2PLRNGFQ3E56CDOGJR/events.json","paper":"https://pith.science/paper/ARK5EFYA"},"agent_actions":{"view_html":"https://pith.science/pith/ARK5EFYA2PLRNGFQ3E56CDOGJR","download_json":"https://pith.science/pith/ARK5EFYA2PLRNGFQ3E56CDOGJR.json","view_paper":"https://pith.science/paper/ARK5EFYA","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1208.6046&json=true","fetch_graph":"https://pith.science/api/pith-number/ARK5EFYA2PLRNGFQ3E56CDOGJR/graph.json","fetch_events":"https://pith.science/api/pith-number/ARK5EFYA2PLRNGFQ3E56CDOGJR/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ARK5EFYA2PLRNGFQ3E56CDOGJR/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ARK5EFYA2PLRNGFQ3E56CDOGJR/action/storage_attestation","attest_author":"https://pith.science/pith/ARK5EFYA2PLRNGFQ3E56CDOGJR/action/author_attestation","sign_citation":"https://pith.science/pith/ARK5EFYA2PLRNGFQ3E56CDOGJR/action/citation_signature","submit_replication":"https://pith.science/pith/ARK5EFYA2PLRNGFQ3E56CDOGJR/action/replication_record"}},"created_at":"2026-05-18T03:46:16.333883+00:00","updated_at":"2026-05-18T03:46:16.333883+00:00"}