{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:EP52SYCIJMYLHOEYD4KQCBHQOX","short_pith_number":"pith:EP52SYCI","canonical_record":{"source":{"id":"1101.1338","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-01-07T01:19:51Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"49dd99fc01987c200b97cb4d3372b18631c7080bad04f8effcb6955957727d5c","abstract_canon_sha256":"a8886f09d892ba1a54d94e64ee15a2e3732f5fd75348a95cb858bca38f2d9e40"},"schema_version":"1.0"},"canonical_sha256":"23fba960484b30b3b8981f150104f075dda21f360a88aa544e457cbe87d3c046","source":{"kind":"arxiv","id":"1101.1338","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.1338","created_at":"2026-05-18T04:31:30Z"},{"alias_kind":"arxiv_version","alias_value":"1101.1338v2","created_at":"2026-05-18T04:31:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.1338","created_at":"2026-05-18T04:31:30Z"},{"alias_kind":"pith_short_12","alias_value":"EP52SYCIJMYL","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"EP52SYCIJMYLHOEY","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"EP52SYCI","created_at":"2026-05-18T12:26:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:EP52SYCIJMYLHOEYD4KQCBHQOX","target":"record","payload":{"canonical_record":{"source":{"id":"1101.1338","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-01-07T01:19:51Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"49dd99fc01987c200b97cb4d3372b18631c7080bad04f8effcb6955957727d5c","abstract_canon_sha256":"a8886f09d892ba1a54d94e64ee15a2e3732f5fd75348a95cb858bca38f2d9e40"},"schema_version":"1.0"},"canonical_sha256":"23fba960484b30b3b8981f150104f075dda21f360a88aa544e457cbe87d3c046","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:31:30.802490Z","signature_b64":"FiUYG5bZ+Itn1KOoGKJCnHk7mYAgXG/58dZUCl0fcwEXJQjM22aRrp8OAph25S475MfLBVS2OC/mS49ACl5dAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"23fba960484b30b3b8981f150104f075dda21f360a88aa544e457cbe87d3c046","last_reissued_at":"2026-05-18T04:31:30.801837Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:31:30.801837Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1101.1338","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":"2026-05-18T04:31:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0buQmRTBr6K321CMDY+XhS9oBQxcvgbm6osFT98jRb8ylYnpkPNex8PDyaO4kbe375cTx4zg6kqWUQhUhAerBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T02:14:33.778606Z"},"content_sha256":"4d690a8d0caee24d141f8555196c8bc116fee30d11c5329f5b1bd2d54224ff8d","schema_version":"1.0","event_id":"sha256:4d690a8d0caee24d141f8555196c8bc116fee30d11c5329f5b1bd2d54224ff8d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:EP52SYCIJMYLHOEYD4KQCBHQOX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Terahertz imaging and spectroscopy of large-area single-layer graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. D. Jameson, A. M. van der Zande, E. D. Minot, J. L. Tomaino, J. W. Kevek, M. J. Paul, P. L. McEuen, R. A. Barton, Yun-Shik Lee","submitted_at":"2011-01-07T01:19:51Z","abstract_excerpt":"We demonstrate terahertz (THz) imaging and spectroscopy of a 15x15-mm^2 single-layer graphene film on Si using broadband THz pulses. The THz images clearly map out the THz carrier dynamics of the graphene-on-Si sample, allowing us to measure sheet conductivity with sub-mm resolution without fabricating electrodes. The THz carrier dynamics are dominated by intraband transitions and the THz-induced electron motion is characterized by a flat spectral response. A theoretical analysis based on the Fresnel coefficients for a metallic thin film shows that the local sheet conductivity varies across th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.1338","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":"2026-05-18T04:31:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Wp3UyP9w0HRSzG4YBpsU3z8vJ5NgPU2ULlt9Tmo7jDeYGR460brP6d7UWW9E5tL7/hcJivdCPF2O/mVYDqFKBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T02:14:33.779258Z"},"content_sha256":"6aa54057004d7941fe1a26bb95d52f29a22a4819c8dcf7d567323c1cca07c137","schema_version":"1.0","event_id":"sha256:6aa54057004d7941fe1a26bb95d52f29a22a4819c8dcf7d567323c1cca07c137"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EP52SYCIJMYLHOEYD4KQCBHQOX/bundle.json","state_url":"https://pith.science/pith/EP52SYCIJMYLHOEYD4KQCBHQOX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EP52SYCIJMYLHOEYD4KQCBHQOX/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":"2026-05-19T02:14:33Z","links":{"resolver":"https://pith.science/pith/EP52SYCIJMYLHOEYD4KQCBHQOX","bundle":"https://pith.science/pith/EP52SYCIJMYLHOEYD4KQCBHQOX/bundle.json","state":"https://pith.science/pith/EP52SYCIJMYLHOEYD4KQCBHQOX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EP52SYCIJMYLHOEYD4KQCBHQOX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:EP52SYCIJMYLHOEYD4KQCBHQOX","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":"a8886f09d892ba1a54d94e64ee15a2e3732f5fd75348a95cb858bca38f2d9e40","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-01-07T01:19:51Z","title_canon_sha256":"49dd99fc01987c200b97cb4d3372b18631c7080bad04f8effcb6955957727d5c"},"schema_version":"1.0","source":{"id":"1101.1338","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.1338","created_at":"2026-05-18T04:31:30Z"},{"alias_kind":"arxiv_version","alias_value":"1101.1338v2","created_at":"2026-05-18T04:31:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.1338","created_at":"2026-05-18T04:31:30Z"},{"alias_kind":"pith_short_12","alias_value":"EP52SYCIJMYL","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"EP52SYCIJMYLHOEY","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"EP52SYCI","created_at":"2026-05-18T12:26:28Z"}],"graph_snapshots":[{"event_id":"sha256:6aa54057004d7941fe1a26bb95d52f29a22a4819c8dcf7d567323c1cca07c137","target":"graph","created_at":"2026-05-18T04:31:30Z","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":"We demonstrate terahertz (THz) imaging and spectroscopy of a 15x15-mm^2 single-layer graphene film on Si using broadband THz pulses. The THz images clearly map out the THz carrier dynamics of the graphene-on-Si sample, allowing us to measure sheet conductivity with sub-mm resolution without fabricating electrodes. The THz carrier dynamics are dominated by intraband transitions and the THz-induced electron motion is characterized by a flat spectral response. A theoretical analysis based on the Fresnel coefficients for a metallic thin film shows that the local sheet conductivity varies across th","authors_text":"A. D. Jameson, A. M. van der Zande, E. D. Minot, J. L. Tomaino, J. W. Kevek, M. J. Paul, P. L. McEuen, R. A. Barton, Yun-Shik Lee","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-01-07T01:19:51Z","title":"Terahertz imaging and spectroscopy of large-area single-layer graphene"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.1338","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":"sha256:4d690a8d0caee24d141f8555196c8bc116fee30d11c5329f5b1bd2d54224ff8d","target":"record","created_at":"2026-05-18T04:31:30Z","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":"a8886f09d892ba1a54d94e64ee15a2e3732f5fd75348a95cb858bca38f2d9e40","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-01-07T01:19:51Z","title_canon_sha256":"49dd99fc01987c200b97cb4d3372b18631c7080bad04f8effcb6955957727d5c"},"schema_version":"1.0","source":{"id":"1101.1338","kind":"arxiv","version":2}},"canonical_sha256":"23fba960484b30b3b8981f150104f075dda21f360a88aa544e457cbe87d3c046","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"23fba960484b30b3b8981f150104f075dda21f360a88aa544e457cbe87d3c046","first_computed_at":"2026-05-18T04:31:30.801837Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:31:30.801837Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FiUYG5bZ+Itn1KOoGKJCnHk7mYAgXG/58dZUCl0fcwEXJQjM22aRrp8OAph25S475MfLBVS2OC/mS49ACl5dAg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:31:30.802490Z","signed_message":"canonical_sha256_bytes"},"source_id":"1101.1338","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4d690a8d0caee24d141f8555196c8bc116fee30d11c5329f5b1bd2d54224ff8d","sha256:6aa54057004d7941fe1a26bb95d52f29a22a4819c8dcf7d567323c1cca07c137"],"state_sha256":"1e5ddfc0f47ceb27809e5e7825bbfa66a692e50eed2704ebc4ee0c4e969920c6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X/nCgSP/HIdZTOjhr2WE1akj2qSE4YqzLcgws/DbpKliuZxMneSbPB1oHBU2FNjyUNFXAUGOZf5eN3s9NQ5aAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T02:14:33.781476Z","bundle_sha256":"774bcaefca3844bb0507511a0c68820bba39493a2840c0004f0670a3c537f4d2"}}