{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:QJJGRUKXB6EOJO4LQFU4SUMQ7X","short_pith_number":"pith:QJJGRUKX","canonical_record":{"source":{"id":"1502.01973","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-02-06T18:12:28Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"94e263b14bce5ae536abbd3785f4c46b5d2a45c2004827ebfacd1d5f752687dd","abstract_canon_sha256":"6fc755f7e7c82bb113a258d1271ec76d02338294db0f4f834df68d51e482262f"},"schema_version":"1.0"},"canonical_sha256":"825268d1570f88e4bb8b8169c95190fdfe2eaaeafc2d7355f20c1aae1c7b9fd2","source":{"kind":"arxiv","id":"1502.01973","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.01973","created_at":"2026-05-18T02:27:50Z"},{"alias_kind":"arxiv_version","alias_value":"1502.01973v1","created_at":"2026-05-18T02:27:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.01973","created_at":"2026-05-18T02:27:50Z"},{"alias_kind":"pith_short_12","alias_value":"QJJGRUKXB6EO","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QJJGRUKXB6EOJO4L","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QJJGRUKX","created_at":"2026-05-18T12:29:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:QJJGRUKXB6EOJO4LQFU4SUMQ7X","target":"record","payload":{"canonical_record":{"source":{"id":"1502.01973","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-02-06T18:12:28Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"94e263b14bce5ae536abbd3785f4c46b5d2a45c2004827ebfacd1d5f752687dd","abstract_canon_sha256":"6fc755f7e7c82bb113a258d1271ec76d02338294db0f4f834df68d51e482262f"},"schema_version":"1.0"},"canonical_sha256":"825268d1570f88e4bb8b8169c95190fdfe2eaaeafc2d7355f20c1aae1c7b9fd2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:27:50.319131Z","signature_b64":"3tGXypyfoZZAsDu6YqtzP6tFWSUZ/iCP0rElUteaC0MO4cs60jxOc+SxW0kRfgKqRLQGl+tPHei/lSFELjj3CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"825268d1570f88e4bb8b8169c95190fdfe2eaaeafc2d7355f20c1aae1c7b9fd2","last_reissued_at":"2026-05-18T02:27:50.318705Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:27:50.318705Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.01973","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":"2026-05-18T02:27:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ga4Dk4rmBs2z1BR9TMdExDZraKsfdDXLh7uFPJ9S8zZCuisS4Um7UJ22eBZ+QtXsP+HKQLHPzHY/fQ3Jp/WBDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T08:58:18.858448Z"},"content_sha256":"0fa661f30b7fe99c805ff5a4c40d0a52834b070fceebac938784c3b4e65e8031","schema_version":"1.0","event_id":"sha256:0fa661f30b7fe99c805ff5a4c40d0a52834b070fceebac938784c3b4e65e8031"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:QJJGRUKXB6EOJO4LQFU4SUMQ7X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultra-Low Threshold Monolayer Semiconductor Nanocavity Lasers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Arka Majumdar, David G. Mandrus, Fariba Hatami, Jelena Vuckovic, Jiaqiang Yan, John R. Schaibley, Liefeng Feng, Sanfeng Wu, Sonia Buckley, Wang Yao, Xiaodong Xu","submitted_at":"2015-02-06T18:12:28Z","abstract_excerpt":"Engineering the electromagnetic environment of a nanoscale light emitter by a photonic cavity can significantly enhance its spontaneous emission rate through cavity quantum electrodynamics in the Purcell regime. This effect can greatly reduce the lasing threshold of the emitter, providing the ultimate low-threshold laser system with small footprint, low power consumption and ultrafast modulation. A state-of-the-art ultra-low threshold nanolaser has been successfully developed though embedding quantum dots into photonic crystal cavity (PhCC). However, several core challenges impede the practica"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.01973","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":"2026-05-18T02:27:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iWKw9DlWiaeOt5NELvyac3hEx6FDfC88FNPH5sf8mR5bN7hW1nKGvfw+jZYwVu1qpdTHlEA1QxdOHsEIgmxyCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T08:58:18.858801Z"},"content_sha256":"93d488d1978772272f42024e2abfe1313309377bd523cd4a624aabaa830fc105","schema_version":"1.0","event_id":"sha256:93d488d1978772272f42024e2abfe1313309377bd523cd4a624aabaa830fc105"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QJJGRUKXB6EOJO4LQFU4SUMQ7X/bundle.json","state_url":"https://pith.science/pith/QJJGRUKXB6EOJO4LQFU4SUMQ7X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QJJGRUKXB6EOJO4LQFU4SUMQ7X/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":"2026-06-04T08:58:18Z","links":{"resolver":"https://pith.science/pith/QJJGRUKXB6EOJO4LQFU4SUMQ7X","bundle":"https://pith.science/pith/QJJGRUKXB6EOJO4LQFU4SUMQ7X/bundle.json","state":"https://pith.science/pith/QJJGRUKXB6EOJO4LQFU4SUMQ7X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QJJGRUKXB6EOJO4LQFU4SUMQ7X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:QJJGRUKXB6EOJO4LQFU4SUMQ7X","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":"6fc755f7e7c82bb113a258d1271ec76d02338294db0f4f834df68d51e482262f","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-02-06T18:12:28Z","title_canon_sha256":"94e263b14bce5ae536abbd3785f4c46b5d2a45c2004827ebfacd1d5f752687dd"},"schema_version":"1.0","source":{"id":"1502.01973","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.01973","created_at":"2026-05-18T02:27:50Z"},{"alias_kind":"arxiv_version","alias_value":"1502.01973v1","created_at":"2026-05-18T02:27:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.01973","created_at":"2026-05-18T02:27:50Z"},{"alias_kind":"pith_short_12","alias_value":"QJJGRUKXB6EO","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QJJGRUKXB6EOJO4L","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QJJGRUKX","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:93d488d1978772272f42024e2abfe1313309377bd523cd4a624aabaa830fc105","target":"graph","created_at":"2026-05-18T02:27:50Z","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":"Engineering the electromagnetic environment of a nanoscale light emitter by a photonic cavity can significantly enhance its spontaneous emission rate through cavity quantum electrodynamics in the Purcell regime. This effect can greatly reduce the lasing threshold of the emitter, providing the ultimate low-threshold laser system with small footprint, low power consumption and ultrafast modulation. A state-of-the-art ultra-low threshold nanolaser has been successfully developed though embedding quantum dots into photonic crystal cavity (PhCC). However, several core challenges impede the practica","authors_text":"Arka Majumdar, David G. Mandrus, Fariba Hatami, Jelena Vuckovic, Jiaqiang Yan, John R. Schaibley, Liefeng Feng, Sanfeng Wu, Sonia Buckley, Wang Yao, Xiaodong Xu","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-02-06T18:12:28Z","title":"Ultra-Low Threshold Monolayer Semiconductor Nanocavity Lasers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.01973","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":"sha256:0fa661f30b7fe99c805ff5a4c40d0a52834b070fceebac938784c3b4e65e8031","target":"record","created_at":"2026-05-18T02:27:50Z","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":"6fc755f7e7c82bb113a258d1271ec76d02338294db0f4f834df68d51e482262f","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-02-06T18:12:28Z","title_canon_sha256":"94e263b14bce5ae536abbd3785f4c46b5d2a45c2004827ebfacd1d5f752687dd"},"schema_version":"1.0","source":{"id":"1502.01973","kind":"arxiv","version":1}},"canonical_sha256":"825268d1570f88e4bb8b8169c95190fdfe2eaaeafc2d7355f20c1aae1c7b9fd2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"825268d1570f88e4bb8b8169c95190fdfe2eaaeafc2d7355f20c1aae1c7b9fd2","first_computed_at":"2026-05-18T02:27:50.318705Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:27:50.318705Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3tGXypyfoZZAsDu6YqtzP6tFWSUZ/iCP0rElUteaC0MO4cs60jxOc+SxW0kRfgKqRLQGl+tPHei/lSFELjj3CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:27:50.319131Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.01973","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0fa661f30b7fe99c805ff5a4c40d0a52834b070fceebac938784c3b4e65e8031","sha256:93d488d1978772272f42024e2abfe1313309377bd523cd4a624aabaa830fc105"],"state_sha256":"f13f386081b952a363f5d08067273782417c1df1435f483db2f795018577949f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kepneyQlDU8KGumrzCOVLpSOiT467bgG9KqeRnZWCcRBF6rKom/JxARw3HlMwJ884BdxU20vZ7iBbA5FG/JDBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T08:58:18.860777Z","bundle_sha256":"a4382eb436ef3972a2bec67a6fb16014eda8a36e8733ee37a6c18fca1b0d2315"}}