{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:IYKM5WYPHW4Y6QYCGYSJ4ML364","short_pith_number":"pith:IYKM5WYP","canonical_record":{"source":{"id":"0909.1363","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2009-09-08T00:47:37Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"f62d80387bfedcdd16cac4b9cb4a237ce2e2d9a3434a96a2573fe4c627a9cf05","abstract_canon_sha256":"28b3a17b0fb270dcbbcaddac93a6271d3f76dde4af6e2c0c0812e5328029cd77"},"schema_version":"1.0"},"canonical_sha256":"4614cedb0f3db98f430236249e317bf72f726a9c697b5787b0e4e4291fdbf5fb","source":{"kind":"arxiv","id":"0909.1363","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.1363","created_at":"2026-05-18T02:11:58Z"},{"alias_kind":"arxiv_version","alias_value":"0909.1363v1","created_at":"2026-05-18T02:11:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.1363","created_at":"2026-05-18T02:11:58Z"},{"alias_kind":"pith_short_12","alias_value":"IYKM5WYPHW4Y","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"IYKM5WYPHW4Y6QYC","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"IYKM5WYP","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:IYKM5WYPHW4Y6QYCGYSJ4ML364","target":"record","payload":{"canonical_record":{"source":{"id":"0909.1363","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2009-09-08T00:47:37Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"f62d80387bfedcdd16cac4b9cb4a237ce2e2d9a3434a96a2573fe4c627a9cf05","abstract_canon_sha256":"28b3a17b0fb270dcbbcaddac93a6271d3f76dde4af6e2c0c0812e5328029cd77"},"schema_version":"1.0"},"canonical_sha256":"4614cedb0f3db98f430236249e317bf72f726a9c697b5787b0e4e4291fdbf5fb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:58.718381Z","signature_b64":"pSMEqEf3AfNJy7TV0uOOqbmeZTbFOegDqnvItIFyZhhr6sG0XWWPOV8TETBXLTw8KkjFmLbpgiQ248dc6PdYCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4614cedb0f3db98f430236249e317bf72f726a9c697b5787b0e4e4291fdbf5fb","last_reissued_at":"2026-05-18T02:11:58.717599Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:58.717599Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.1363","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":"2026-05-18T02:11:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xVNEMqIH1FTb2A0xvvdR8lX66GYpA4g4+CynMlq9F8yTjQPrK6o5QTijsAmY0IhIJ4yBxDM2fTizLYKgLW8GCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T15:53:21.684524Z"},"content_sha256":"f694c8201ecc563601b83a60e36b61b2222f76d9d300b54772c2a17356087b76","schema_version":"1.0","event_id":"sha256:f694c8201ecc563601b83a60e36b61b2222f76d9d300b54772c2a17356087b76"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:IYKM5WYPHW4Y6QYCGYSJ4ML364","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical loss compensation in a bulk left-handed metamaterial by the gain in quantum dots","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.optics","authors_text":"Hui Liu, Jing-Xiao Cao, Shi-Ning Zhu, Shu-Ming Wang, Tao Li, X. Zhang, Zheng-Gao Dong, Zhi-Hong Zhu","submitted_at":"2009-09-08T00:47:37Z","abstract_excerpt":"A bulk left-handed metamaterial with fishnet structure is investigated to show the optical loss compensation via surface plasmon amplification, with the assistance of a Gaussian gain in PbS quantum dots. The optical resonance enhancement around 200 THz is confirmed by the retrieval method. By exploring the dependence of propagation loss on the gain coefficient and metamaterial thickness, we verify numerically that the left-handed response can endure a large propagation thickness with ultralow and stable loss under a certain gain coefficient."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.1363","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":"2026-05-18T02:11:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6Ai5xiLga0wlna+jPPgUiH/6jvVYFtUNYCWUxbpsqgalslHIN7Si40M+bxkGb2+HuHlxYlXDL210LHyZF2BsAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T15:53:21.685207Z"},"content_sha256":"aa0561b7b73e76c30b2bdbac85a64dec107258fba3e29fb9597499cf0a973714","schema_version":"1.0","event_id":"sha256:aa0561b7b73e76c30b2bdbac85a64dec107258fba3e29fb9597499cf0a973714"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IYKM5WYPHW4Y6QYCGYSJ4ML364/bundle.json","state_url":"https://pith.science/pith/IYKM5WYPHW4Y6QYCGYSJ4ML364/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IYKM5WYPHW4Y6QYCGYSJ4ML364/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":"2026-05-30T15:53:21Z","links":{"resolver":"https://pith.science/pith/IYKM5WYPHW4Y6QYCGYSJ4ML364","bundle":"https://pith.science/pith/IYKM5WYPHW4Y6QYCGYSJ4ML364/bundle.json","state":"https://pith.science/pith/IYKM5WYPHW4Y6QYCGYSJ4ML364/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IYKM5WYPHW4Y6QYCGYSJ4ML364/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:IYKM5WYPHW4Y6QYCGYSJ4ML364","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":"28b3a17b0fb270dcbbcaddac93a6271d3f76dde4af6e2c0c0812e5328029cd77","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2009-09-08T00:47:37Z","title_canon_sha256":"f62d80387bfedcdd16cac4b9cb4a237ce2e2d9a3434a96a2573fe4c627a9cf05"},"schema_version":"1.0","source":{"id":"0909.1363","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.1363","created_at":"2026-05-18T02:11:58Z"},{"alias_kind":"arxiv_version","alias_value":"0909.1363v1","created_at":"2026-05-18T02:11:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.1363","created_at":"2026-05-18T02:11:58Z"},{"alias_kind":"pith_short_12","alias_value":"IYKM5WYPHW4Y","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"IYKM5WYPHW4Y6QYC","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"IYKM5WYP","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:aa0561b7b73e76c30b2bdbac85a64dec107258fba3e29fb9597499cf0a973714","target":"graph","created_at":"2026-05-18T02:11:58Z","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":"A bulk left-handed metamaterial with fishnet structure is investigated to show the optical loss compensation via surface plasmon amplification, with the assistance of a Gaussian gain in PbS quantum dots. The optical resonance enhancement around 200 THz is confirmed by the retrieval method. By exploring the dependence of propagation loss on the gain coefficient and metamaterial thickness, we verify numerically that the left-handed response can endure a large propagation thickness with ultralow and stable loss under a certain gain coefficient.","authors_text":"Hui Liu, Jing-Xiao Cao, Shi-Ning Zhu, Shu-Ming Wang, Tao Li, X. Zhang, Zheng-Gao Dong, Zhi-Hong Zhu","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2009-09-08T00:47:37Z","title":"Optical loss compensation in a bulk left-handed metamaterial by the gain in quantum dots"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.1363","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:f694c8201ecc563601b83a60e36b61b2222f76d9d300b54772c2a17356087b76","target":"record","created_at":"2026-05-18T02:11:58Z","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":"28b3a17b0fb270dcbbcaddac93a6271d3f76dde4af6e2c0c0812e5328029cd77","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2009-09-08T00:47:37Z","title_canon_sha256":"f62d80387bfedcdd16cac4b9cb4a237ce2e2d9a3434a96a2573fe4c627a9cf05"},"schema_version":"1.0","source":{"id":"0909.1363","kind":"arxiv","version":1}},"canonical_sha256":"4614cedb0f3db98f430236249e317bf72f726a9c697b5787b0e4e4291fdbf5fb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4614cedb0f3db98f430236249e317bf72f726a9c697b5787b0e4e4291fdbf5fb","first_computed_at":"2026-05-18T02:11:58.717599Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:58.717599Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pSMEqEf3AfNJy7TV0uOOqbmeZTbFOegDqnvItIFyZhhr6sG0XWWPOV8TETBXLTw8KkjFmLbpgiQ248dc6PdYCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:58.718381Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.1363","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f694c8201ecc563601b83a60e36b61b2222f76d9d300b54772c2a17356087b76","sha256:aa0561b7b73e76c30b2bdbac85a64dec107258fba3e29fb9597499cf0a973714"],"state_sha256":"a1551eb664093bca5292506463cd9b03b3b0bab0a046f2c57efba2c84fa711af"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cl6JdNJ6T42HEbjqxB3WXib6DIHlV4o28s3WfgreYFFrsPKs54xpbAARhnTjabIIVVQ85EoTbSduBwALwbRmCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T15:53:21.688997Z","bundle_sha256":"944483f40703aa94eb9b94c658d975cdcf2cc2740c177fb2d587b07412ae9897"}}