{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:IWUSFLAQCHJ3XJRU35YGN6BZWB","short_pith_number":"pith:IWUSFLAQ","canonical_record":{"source":{"id":"1711.04324","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2017-11-12T17:32:51Z","cross_cats_sorted":[],"title_canon_sha256":"903f2bb485559fd5c260b428068dbfed42669d2c9efb84674e8501154e79ad6a","abstract_canon_sha256":"b641090e8e548e2a5e8ed13eb853a6a0a230896eab30682df59a8b692414ca74"},"schema_version":"1.0"},"canonical_sha256":"45a922ac1011d3bba634df7066f839b0596f11e21950f96110ee620c7250f737","source":{"kind":"arxiv","id":"1711.04324","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.04324","created_at":"2026-05-18T00:30:39Z"},{"alias_kind":"arxiv_version","alias_value":"1711.04324v1","created_at":"2026-05-18T00:30:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.04324","created_at":"2026-05-18T00:30:39Z"},{"alias_kind":"pith_short_12","alias_value":"IWUSFLAQCHJ3","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_16","alias_value":"IWUSFLAQCHJ3XJRU","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_8","alias_value":"IWUSFLAQ","created_at":"2026-05-18T12:31:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:IWUSFLAQCHJ3XJRU35YGN6BZWB","target":"record","payload":{"canonical_record":{"source":{"id":"1711.04324","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2017-11-12T17:32:51Z","cross_cats_sorted":[],"title_canon_sha256":"903f2bb485559fd5c260b428068dbfed42669d2c9efb84674e8501154e79ad6a","abstract_canon_sha256":"b641090e8e548e2a5e8ed13eb853a6a0a230896eab30682df59a8b692414ca74"},"schema_version":"1.0"},"canonical_sha256":"45a922ac1011d3bba634df7066f839b0596f11e21950f96110ee620c7250f737","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:30:39.415702Z","signature_b64":"xHZkGDdDpwRXCch/+mtdBE/4O26qdA/0o7Jz8aQ2JK1pBXsOAG8KMF3qoU2A4pWNv6Bqm6+VT/3bp7Zo4XniBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"45a922ac1011d3bba634df7066f839b0596f11e21950f96110ee620c7250f737","last_reissued_at":"2026-05-18T00:30:39.415006Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:30:39.415006Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.04324","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":"2026-05-18T00:30:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HzbS/NfN6BnZwGFXeTKAxpHAm87EuO23YiSE6/X5dSM9kg3PjkmNdRPj7l/3bj/z4HpfcRmggPGabfmRTXT3Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T10:39:22.312441Z"},"content_sha256":"f02b98f0b183a90694f0cfd3e3051879d18f8f8029000abb8da33f50d3363fdd","schema_version":"1.0","event_id":"sha256:f02b98f0b183a90694f0cfd3e3051879d18f8f8029000abb8da33f50d3363fdd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:IWUSFLAQCHJ3XJRU35YGN6BZWB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Selective excitation and imaging of ultraslow phonon polaritons in thin hexagonal boron nitride crystals","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.app-ph","authors_text":"Antonio Ambrosio, Federico Capasso, Kundan Chaudhary, Luis A. Jauregui, Michele Tamagnone, Philip Kim, William L. Wilson","submitted_at":"2017-11-12T17:32:51Z","abstract_excerpt":"Polaritons in 2D and van der Waals (vdW) materials have been investigated in several recent works as an innovative platform for light-matter interaction, rich of new physical phenomena.Hexagonal Boron Nitride (h-BN), in particular, is an out of plane anisotropic material (while it is in-plane isotropic) with two very strong phonon polaritons bands where the permittivity becomes negative. In the first restrahlen band (RS1, 780-830 cm-1) the relative out of plane permittivity is negative, while in the second restrahlen band (RS2, 1370-1610 cm-1) the relative in-plane permittivity is negative. Du"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.04324","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":"2026-05-18T00:30:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"suj/ahGegV5p3wAJa5QnNtQiRKYzEH7suff+L5DdzFbLZI4YzYTxW2jhrXd91lrrW0Bkd4PDd81yFAAps/gICw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T10:39:22.313134Z"},"content_sha256":"13196791d2fe41cca664e488d7847bdcd0d878363bbb998ab3fba301a7a4e51c","schema_version":"1.0","event_id":"sha256:13196791d2fe41cca664e488d7847bdcd0d878363bbb998ab3fba301a7a4e51c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IWUSFLAQCHJ3XJRU35YGN6BZWB/bundle.json","state_url":"https://pith.science/pith/IWUSFLAQCHJ3XJRU35YGN6BZWB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IWUSFLAQCHJ3XJRU35YGN6BZWB/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":"2026-05-26T10:39:22Z","links":{"resolver":"https://pith.science/pith/IWUSFLAQCHJ3XJRU35YGN6BZWB","bundle":"https://pith.science/pith/IWUSFLAQCHJ3XJRU35YGN6BZWB/bundle.json","state":"https://pith.science/pith/IWUSFLAQCHJ3XJRU35YGN6BZWB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IWUSFLAQCHJ3XJRU35YGN6BZWB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:IWUSFLAQCHJ3XJRU35YGN6BZWB","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":"b641090e8e548e2a5e8ed13eb853a6a0a230896eab30682df59a8b692414ca74","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2017-11-12T17:32:51Z","title_canon_sha256":"903f2bb485559fd5c260b428068dbfed42669d2c9efb84674e8501154e79ad6a"},"schema_version":"1.0","source":{"id":"1711.04324","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.04324","created_at":"2026-05-18T00:30:39Z"},{"alias_kind":"arxiv_version","alias_value":"1711.04324v1","created_at":"2026-05-18T00:30:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.04324","created_at":"2026-05-18T00:30:39Z"},{"alias_kind":"pith_short_12","alias_value":"IWUSFLAQCHJ3","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_16","alias_value":"IWUSFLAQCHJ3XJRU","created_at":"2026-05-18T12:31:21Z"},{"alias_kind":"pith_short_8","alias_value":"IWUSFLAQ","created_at":"2026-05-18T12:31:21Z"}],"graph_snapshots":[{"event_id":"sha256:13196791d2fe41cca664e488d7847bdcd0d878363bbb998ab3fba301a7a4e51c","target":"graph","created_at":"2026-05-18T00:30:39Z","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":"Polaritons in 2D and van der Waals (vdW) materials have been investigated in several recent works as an innovative platform for light-matter interaction, rich of new physical phenomena.Hexagonal Boron Nitride (h-BN), in particular, is an out of plane anisotropic material (while it is in-plane isotropic) with two very strong phonon polaritons bands where the permittivity becomes negative. In the first restrahlen band (RS1, 780-830 cm-1) the relative out of plane permittivity is negative, while in the second restrahlen band (RS2, 1370-1610 cm-1) the relative in-plane permittivity is negative. Du","authors_text":"Antonio Ambrosio, Federico Capasso, Kundan Chaudhary, Luis A. Jauregui, Michele Tamagnone, Philip Kim, William L. Wilson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2017-11-12T17:32:51Z","title":"Selective excitation and imaging of ultraslow phonon polaritons in thin hexagonal boron nitride crystals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.04324","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:f02b98f0b183a90694f0cfd3e3051879d18f8f8029000abb8da33f50d3363fdd","target":"record","created_at":"2026-05-18T00:30:39Z","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":"b641090e8e548e2a5e8ed13eb853a6a0a230896eab30682df59a8b692414ca74","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2017-11-12T17:32:51Z","title_canon_sha256":"903f2bb485559fd5c260b428068dbfed42669d2c9efb84674e8501154e79ad6a"},"schema_version":"1.0","source":{"id":"1711.04324","kind":"arxiv","version":1}},"canonical_sha256":"45a922ac1011d3bba634df7066f839b0596f11e21950f96110ee620c7250f737","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"45a922ac1011d3bba634df7066f839b0596f11e21950f96110ee620c7250f737","first_computed_at":"2026-05-18T00:30:39.415006Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:30:39.415006Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xHZkGDdDpwRXCch/+mtdBE/4O26qdA/0o7Jz8aQ2JK1pBXsOAG8KMF3qoU2A4pWNv6Bqm6+VT/3bp7Zo4XniBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:30:39.415702Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.04324","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f02b98f0b183a90694f0cfd3e3051879d18f8f8029000abb8da33f50d3363fdd","sha256:13196791d2fe41cca664e488d7847bdcd0d878363bbb998ab3fba301a7a4e51c"],"state_sha256":"d9dd4607c4ad8d57b7707ae74db587540b6b2c92b5e1d3b05df5d8f5a3a6226a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MCpgiPbkl0MwBbLLIAjT05C600u05z/iTgs/sS/4MXuZ+SY/YAImlND5SNeivj/7Czqsqg5JeP43yd1YK82uDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T10:39:22.316759Z","bundle_sha256":"a8b16c566b3e9f46e8d4ad4748cb6ed64525e5ef71d2bcfdc8abcf3b517ccd82"}}