{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:VBTF34ULEUTE4CM6SJHB2FPSBJ","short_pith_number":"pith:VBTF34UL","canonical_record":{"source":{"id":"2004.09402","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-04-20T15:57:37Z","cross_cats_sorted":[],"title_canon_sha256":"61057c8a032cc59de7e96dffcae59b02f25b9a4e0671ab313d756987eb231b49","abstract_canon_sha256":"10e9a2adb425d47b406a2ef388a4068a5bc776357ff971be7738324eaf2c3772"},"schema_version":"1.0"},"canonical_sha256":"a8665df28b25264e099e924e1d15f20a708dc8aa7a6db05d59c860097505d601","source":{"kind":"arxiv","id":"2004.09402","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.09402","created_at":"2026-07-05T00:56:15Z"},{"alias_kind":"arxiv_version","alias_value":"2004.09402v1","created_at":"2026-07-05T00:56:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.09402","created_at":"2026-07-05T00:56:15Z"},{"alias_kind":"pith_short_12","alias_value":"VBTF34ULEUTE","created_at":"2026-07-05T00:56:15Z"},{"alias_kind":"pith_short_16","alias_value":"VBTF34ULEUTE4CM6","created_at":"2026-07-05T00:56:15Z"},{"alias_kind":"pith_short_8","alias_value":"VBTF34UL","created_at":"2026-07-05T00:56:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:VBTF34ULEUTE4CM6SJHB2FPSBJ","target":"record","payload":{"canonical_record":{"source":{"id":"2004.09402","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-04-20T15:57:37Z","cross_cats_sorted":[],"title_canon_sha256":"61057c8a032cc59de7e96dffcae59b02f25b9a4e0671ab313d756987eb231b49","abstract_canon_sha256":"10e9a2adb425d47b406a2ef388a4068a5bc776357ff971be7738324eaf2c3772"},"schema_version":"1.0"},"canonical_sha256":"a8665df28b25264e099e924e1d15f20a708dc8aa7a6db05d59c860097505d601","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:56:15.497710Z","signature_b64":"5fdBniJ5LCyTlUAE/F2Ajlmi4zdW9KaN/a3hDE2FPPS7JczyScH5VM4KIcSYTDytZQQHR9+ZtAs1HJEdA9kfDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a8665df28b25264e099e924e1d15f20a708dc8aa7a6db05d59c860097505d601","last_reissued_at":"2026-07-05T00:56:15.497300Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:56:15.497300Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2004.09402","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":"2026-07-05T00:56:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DuaUOCXO8IKGFNfLbKpnqDGSJss0S3RyeTUq1ewA74cBYNuZ24ROek+6i5N2kuzI6R3qgwci+bpovtfWnupUAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T19:25:51.701676Z"},"content_sha256":"e9abea4806e998a9ebbb5fb3bcfe8d2fc598f0da7abfb0e66929d33a56109e2c","schema_version":"1.0","event_id":"sha256:e9abea4806e998a9ebbb5fb3bcfe8d2fc598f0da7abfb0e66929d33a56109e2c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:VBTF34ULEUTE4CM6SJHB2FPSBJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Electrically injected GeSn lasers on Si operating up to 100 K","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.app-ph","authors_text":"Baohua Li, Gregory Salamo, Greg Sun, Grey Abernathy, Huong Tran, Jifeng Liu, Joe Margetis, John Tolle, Joshua M. Grant, Richard A. Soref, Shui-Qing Yu, Solomon Ojo, Sylvester Amoah, Wei Du, Yiyin Zhou, Yong-Hang Zhang, Yuanhao Miao","submitted_at":"2020-04-20T15:57:37Z","abstract_excerpt":"The significant progress of GeSn material development has enabled a feasible solution to the long-desired monolithically integrated lasers on the Si platform. While there are many reports focused on optically pumped lasers, GeSn lasers through electrical injection have not been experimentally achieved yet. In this work, we report the first demonstration of electrically injected GeSn lasers on Si. A GeSn/SiGeSn heterostructure diode grown on a Si substrate was fabricated into ridge waveguide laser devices and tested under pulsed conditions. Special considerations were given for the structure de"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.09402","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2004.09402/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:56:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YhSW344hnIVDcwkAyD7g9EuclBK8q9V/ObO4OI0kgjHcRMp2CQ9kMNAEBcQUG61kiuf2o/VQAEUxDcjOxUk3CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T19:25:51.702157Z"},"content_sha256":"ae1a6175a6da64aecea244f08754ca53ad42682b15acd8817de40260db448a94","schema_version":"1.0","event_id":"sha256:ae1a6175a6da64aecea244f08754ca53ad42682b15acd8817de40260db448a94"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VBTF34ULEUTE4CM6SJHB2FPSBJ/bundle.json","state_url":"https://pith.science/pith/VBTF34ULEUTE4CM6SJHB2FPSBJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VBTF34ULEUTE4CM6SJHB2FPSBJ/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":"2026-08-06T19:25:51Z","links":{"resolver":"https://pith.science/pith/VBTF34ULEUTE4CM6SJHB2FPSBJ","bundle":"https://pith.science/pith/VBTF34ULEUTE4CM6SJHB2FPSBJ/bundle.json","state":"https://pith.science/pith/VBTF34ULEUTE4CM6SJHB2FPSBJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VBTF34ULEUTE4CM6SJHB2FPSBJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:VBTF34ULEUTE4CM6SJHB2FPSBJ","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":"10e9a2adb425d47b406a2ef388a4068a5bc776357ff971be7738324eaf2c3772","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-04-20T15:57:37Z","title_canon_sha256":"61057c8a032cc59de7e96dffcae59b02f25b9a4e0671ab313d756987eb231b49"},"schema_version":"1.0","source":{"id":"2004.09402","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.09402","created_at":"2026-07-05T00:56:15Z"},{"alias_kind":"arxiv_version","alias_value":"2004.09402v1","created_at":"2026-07-05T00:56:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.09402","created_at":"2026-07-05T00:56:15Z"},{"alias_kind":"pith_short_12","alias_value":"VBTF34ULEUTE","created_at":"2026-07-05T00:56:15Z"},{"alias_kind":"pith_short_16","alias_value":"VBTF34ULEUTE4CM6","created_at":"2026-07-05T00:56:15Z"},{"alias_kind":"pith_short_8","alias_value":"VBTF34UL","created_at":"2026-07-05T00:56:15Z"}],"graph_snapshots":[{"event_id":"sha256:ae1a6175a6da64aecea244f08754ca53ad42682b15acd8817de40260db448a94","target":"graph","created_at":"2026-07-05T00:56:15Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2004.09402/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The significant progress of GeSn material development has enabled a feasible solution to the long-desired monolithically integrated lasers on the Si platform. While there are many reports focused on optically pumped lasers, GeSn lasers through electrical injection have not been experimentally achieved yet. In this work, we report the first demonstration of electrically injected GeSn lasers on Si. A GeSn/SiGeSn heterostructure diode grown on a Si substrate was fabricated into ridge waveguide laser devices and tested under pulsed conditions. Special considerations were given for the structure de","authors_text":"Baohua Li, Gregory Salamo, Greg Sun, Grey Abernathy, Huong Tran, Jifeng Liu, Joe Margetis, John Tolle, Joshua M. Grant, Richard A. Soref, Shui-Qing Yu, Solomon Ojo, Sylvester Amoah, Wei Du, Yiyin Zhou, Yong-Hang Zhang, Yuanhao Miao","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-04-20T15:57:37Z","title":"Electrically injected GeSn lasers on Si operating up to 100 K"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.09402","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:e9abea4806e998a9ebbb5fb3bcfe8d2fc598f0da7abfb0e66929d33a56109e2c","target":"record","created_at":"2026-07-05T00:56:15Z","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":"10e9a2adb425d47b406a2ef388a4068a5bc776357ff971be7738324eaf2c3772","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2020-04-20T15:57:37Z","title_canon_sha256":"61057c8a032cc59de7e96dffcae59b02f25b9a4e0671ab313d756987eb231b49"},"schema_version":"1.0","source":{"id":"2004.09402","kind":"arxiv","version":1}},"canonical_sha256":"a8665df28b25264e099e924e1d15f20a708dc8aa7a6db05d59c860097505d601","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a8665df28b25264e099e924e1d15f20a708dc8aa7a6db05d59c860097505d601","first_computed_at":"2026-07-05T00:56:15.497300Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:56:15.497300Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5fdBniJ5LCyTlUAE/F2Ajlmi4zdW9KaN/a3hDE2FPPS7JczyScH5VM4KIcSYTDytZQQHR9+ZtAs1HJEdA9kfDA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:56:15.497710Z","signed_message":"canonical_sha256_bytes"},"source_id":"2004.09402","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e9abea4806e998a9ebbb5fb3bcfe8d2fc598f0da7abfb0e66929d33a56109e2c","sha256:ae1a6175a6da64aecea244f08754ca53ad42682b15acd8817de40260db448a94"],"state_sha256":"9952fe09b675323296219fb371424c66141c091633b8a0456d8703466e06142a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hPa1tHFnRAMH5JBZcISQti6aXPMia5K1ADgCIeIhc3/i9F2aUcex15l4hTJQ/L33/tWbTkbpFB9R06jwq2FhBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T19:25:51.705401Z","bundle_sha256":"43f33d8f8c589a39ed72620f84ddba75a9cd9550549d70196511665dd21c2588"}}