{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:EEII44UEDOJKO7LPEUXT4YGJP4","short_pith_number":"pith:EEII44UE","schema_version":"1.0","canonical_sha256":"21108e72841b92a77d6f252f3e60c97f2072349664a51e9add6ae0c18bbd1e35","source":{"kind":"arxiv","id":"1604.07376","version":1},"attestation_state":"computed","paper":{"title":"A Modified $8f$ Geometry With Reduced Optical Aberrations For Improved Time Domain Terahertz Spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci","physics.ins-det"],"primary_cat":"physics.optics","authors_text":"Bing Cheng, N. J. Laurita, N. P. Armitage, R. Barkhouser, V. A. Neumann","submitted_at":"2016-04-25T19:32:28Z","abstract_excerpt":"We present a modified $8f$ geometry for time domain terahertz (THz) spectroscopy (TDTS) experiments. We show, through simulations and data, that a simple rearranging of the off-axis parabolic mirrors, which are typically used to focus and direct THz radiation in TDTS experiments, results in a nearly 40% reduction in the THz focal spot diameter. This effect stems from significant reduction of the principle optical aberrations which are enhanced in the conventional $8f$ geometry but partially compensated in the modified $8f$ experimental setup. We compare data from our home-built TDTS spectromet"},"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":"1604.07376","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-04-25T19:32:28Z","cross_cats_sorted":["cond-mat.mtrl-sci","physics.ins-det"],"title_canon_sha256":"f1fdfc8760590c5a0a9a820e08d9b41daa228d75f14cc922dc1db332292efba7","abstract_canon_sha256":"dad5bd2e1b40845b6c9c32899f8c932d5b3cf9955e9360efbba5516cc884ee60"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:08:09.763025Z","signature_b64":"Ol2238x5T0LtbHXFLSrHitbrnxepPBq0NdO/idFbjx0QxmSidwxRX2TCH+igCgwZf0EWWjjTkL4SJ7nP3VgQBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"21108e72841b92a77d6f252f3e60c97f2072349664a51e9add6ae0c18bbd1e35","last_reissued_at":"2026-05-18T01:08:09.762634Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:08:09.762634Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A Modified $8f$ Geometry With Reduced Optical Aberrations For Improved Time Domain Terahertz Spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci","physics.ins-det"],"primary_cat":"physics.optics","authors_text":"Bing Cheng, N. J. Laurita, N. P. Armitage, R. Barkhouser, V. A. Neumann","submitted_at":"2016-04-25T19:32:28Z","abstract_excerpt":"We present a modified $8f$ geometry for time domain terahertz (THz) spectroscopy (TDTS) experiments. We show, through simulations and data, that a simple rearranging of the off-axis parabolic mirrors, which are typically used to focus and direct THz radiation in TDTS experiments, results in a nearly 40% reduction in the THz focal spot diameter. This effect stems from significant reduction of the principle optical aberrations which are enhanced in the conventional $8f$ geometry but partially compensated in the modified $8f$ experimental setup. We compare data from our home-built TDTS spectromet"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.07376","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1604.07376","created_at":"2026-05-18T01:08:09.762695+00:00"},{"alias_kind":"arxiv_version","alias_value":"1604.07376v1","created_at":"2026-05-18T01:08:09.762695+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.07376","created_at":"2026-05-18T01:08:09.762695+00:00"},{"alias_kind":"pith_short_12","alias_value":"EEII44UEDOJK","created_at":"2026-05-18T12:30:12.583610+00:00"},{"alias_kind":"pith_short_16","alias_value":"EEII44UEDOJKO7LP","created_at":"2026-05-18T12:30:12.583610+00:00"},{"alias_kind":"pith_short_8","alias_value":"EEII44UE","created_at":"2026-05-18T12:30:12.583610+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/EEII44UEDOJKO7LPEUXT4YGJP4","json":"https://pith.science/pith/EEII44UEDOJKO7LPEUXT4YGJP4.json","graph_json":"https://pith.science/api/pith-number/EEII44UEDOJKO7LPEUXT4YGJP4/graph.json","events_json":"https://pith.science/api/pith-number/EEII44UEDOJKO7LPEUXT4YGJP4/events.json","paper":"https://pith.science/paper/EEII44UE"},"agent_actions":{"view_html":"https://pith.science/pith/EEII44UEDOJKO7LPEUXT4YGJP4","download_json":"https://pith.science/pith/EEII44UEDOJKO7LPEUXT4YGJP4.json","view_paper":"https://pith.science/paper/EEII44UE","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1604.07376&json=true","fetch_graph":"https://pith.science/api/pith-number/EEII44UEDOJKO7LPEUXT4YGJP4/graph.json","fetch_events":"https://pith.science/api/pith-number/EEII44UEDOJKO7LPEUXT4YGJP4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/EEII44UEDOJKO7LPEUXT4YGJP4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/EEII44UEDOJKO7LPEUXT4YGJP4/action/storage_attestation","attest_author":"https://pith.science/pith/EEII44UEDOJKO7LPEUXT4YGJP4/action/author_attestation","sign_citation":"https://pith.science/pith/EEII44UEDOJKO7LPEUXT4YGJP4/action/citation_signature","submit_replication":"https://pith.science/pith/EEII44UEDOJKO7LPEUXT4YGJP4/action/replication_record"}},"created_at":"2026-05-18T01:08:09.762695+00:00","updated_at":"2026-05-18T01:08:09.762695+00:00"}