{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:JAMS7LEKIXR7R7GOKARZ36DRPB","short_pith_number":"pith:JAMS7LEK","canonical_record":{"source":{"id":"1605.09528","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-05-31T08:46:54Z","cross_cats_sorted":[],"title_canon_sha256":"6860b947e30e465eac2b9c1003c982418fa7b408077d76d9f4c4add66d8e8e2d","abstract_canon_sha256":"13347db59ee34f0318f987a0e3fbe707611d35696dbab6ccb49704145fbd37cc"},"schema_version":"1.0"},"canonical_sha256":"48192fac8a45e3f8fcce50239df8717868a88c8cf33b239af7a1ef04af0426d9","source":{"kind":"arxiv","id":"1605.09528","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.09528","created_at":"2026-05-18T01:04:05Z"},{"alias_kind":"arxiv_version","alias_value":"1605.09528v1","created_at":"2026-05-18T01:04:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.09528","created_at":"2026-05-18T01:04:05Z"},{"alias_kind":"pith_short_12","alias_value":"JAMS7LEKIXR7","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_16","alias_value":"JAMS7LEKIXR7R7GO","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_8","alias_value":"JAMS7LEK","created_at":"2026-05-18T12:30:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:JAMS7LEKIXR7R7GOKARZ36DRPB","target":"record","payload":{"canonical_record":{"source":{"id":"1605.09528","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-05-31T08:46:54Z","cross_cats_sorted":[],"title_canon_sha256":"6860b947e30e465eac2b9c1003c982418fa7b408077d76d9f4c4add66d8e8e2d","abstract_canon_sha256":"13347db59ee34f0318f987a0e3fbe707611d35696dbab6ccb49704145fbd37cc"},"schema_version":"1.0"},"canonical_sha256":"48192fac8a45e3f8fcce50239df8717868a88c8cf33b239af7a1ef04af0426d9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:04:05.485444Z","signature_b64":"xsQUafAxmK5Qkmq0VKIFySbO7I6XhVoOS6RK7Q02kSy6I/Bwz3qkwpSXqy4yOU8u6l4xzAQTWnY8I3OEVjGbCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"48192fac8a45e3f8fcce50239df8717868a88c8cf33b239af7a1ef04af0426d9","last_reissued_at":"2026-05-18T01:04:05.484902Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:04:05.484902Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.09528","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":"2026-05-18T01:04:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pmI/O6YB7n7KepWS4P2NU0+x9trCxrQelM3K4TjLiviQ+PGxpMqEKowRPgHTntGSBBIBlBUGYfHRuwbcMfdOAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:35:18.613206Z"},"content_sha256":"1e6ac11535f6162095c4a5b1173fea5b510af459b481b1ecc03108553f0ce4ce","schema_version":"1.0","event_id":"sha256:1e6ac11535f6162095c4a5b1173fea5b510af459b481b1ecc03108553f0ce4ce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:JAMS7LEKIXR7R7GOKARZ36DRPB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Short pulse generation and mode control of broadband terahertz quantum cascade lasers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Dominic Bachmann, Giacomo Scalari, J\\'er\\^ome Faist, Juraj Darmo, Karl Unterrainer, Markus R\\\"osch, Martin J. S\\\"uess, Mattias Beck","submitted_at":"2016-05-31T08:46:54Z","abstract_excerpt":"We report on a waveguide engineering technique that enables the generation of a bandwidth up to 1 THz and record ultra-short pulse length of 2.5 ps in injection seeded terahertz quantum cascade lasers. The reported technique is able to control and fully suppress higher order lateral modes in broadband terahertz quantum cascade lasers by introducing side-absorbers to metal-metal waveguides. The side-absorbers consist of a top metalization set-back with respect to the laser ridge and an additional lossy metal layer. In continuous wave operation the side-absorbers lead to octave spanning laser em"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.09528","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":"2026-05-18T01:04:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M5vvJKmvb1KTI12D6RRqpm1JgqnQdVxDIDNAOQ5of4sTSycms0xgTCjWZvHHmrmNf2tCjyTdAZtPfErjrqTwBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:35:18.614011Z"},"content_sha256":"e8b17050dbbd93348fbe253ece07f346e610e24fb695732a78de48f7d5f568cc","schema_version":"1.0","event_id":"sha256:e8b17050dbbd93348fbe253ece07f346e610e24fb695732a78de48f7d5f568cc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JAMS7LEKIXR7R7GOKARZ36DRPB/bundle.json","state_url":"https://pith.science/pith/JAMS7LEKIXR7R7GOKARZ36DRPB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JAMS7LEKIXR7R7GOKARZ36DRPB/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":"2026-05-30T08:35:18Z","links":{"resolver":"https://pith.science/pith/JAMS7LEKIXR7R7GOKARZ36DRPB","bundle":"https://pith.science/pith/JAMS7LEKIXR7R7GOKARZ36DRPB/bundle.json","state":"https://pith.science/pith/JAMS7LEKIXR7R7GOKARZ36DRPB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JAMS7LEKIXR7R7GOKARZ36DRPB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:JAMS7LEKIXR7R7GOKARZ36DRPB","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":"13347db59ee34f0318f987a0e3fbe707611d35696dbab6ccb49704145fbd37cc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-05-31T08:46:54Z","title_canon_sha256":"6860b947e30e465eac2b9c1003c982418fa7b408077d76d9f4c4add66d8e8e2d"},"schema_version":"1.0","source":{"id":"1605.09528","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.09528","created_at":"2026-05-18T01:04:05Z"},{"alias_kind":"arxiv_version","alias_value":"1605.09528v1","created_at":"2026-05-18T01:04:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.09528","created_at":"2026-05-18T01:04:05Z"},{"alias_kind":"pith_short_12","alias_value":"JAMS7LEKIXR7","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_16","alias_value":"JAMS7LEKIXR7R7GO","created_at":"2026-05-18T12:30:22Z"},{"alias_kind":"pith_short_8","alias_value":"JAMS7LEK","created_at":"2026-05-18T12:30:22Z"}],"graph_snapshots":[{"event_id":"sha256:e8b17050dbbd93348fbe253ece07f346e610e24fb695732a78de48f7d5f568cc","target":"graph","created_at":"2026-05-18T01:04:05Z","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 report on a waveguide engineering technique that enables the generation of a bandwidth up to 1 THz and record ultra-short pulse length of 2.5 ps in injection seeded terahertz quantum cascade lasers. The reported technique is able to control and fully suppress higher order lateral modes in broadband terahertz quantum cascade lasers by introducing side-absorbers to metal-metal waveguides. The side-absorbers consist of a top metalization set-back with respect to the laser ridge and an additional lossy metal layer. In continuous wave operation the side-absorbers lead to octave spanning laser em","authors_text":"Dominic Bachmann, Giacomo Scalari, J\\'er\\^ome Faist, Juraj Darmo, Karl Unterrainer, Markus R\\\"osch, Martin J. S\\\"uess, Mattias Beck","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-05-31T08:46:54Z","title":"Short pulse generation and mode control of broadband terahertz quantum cascade lasers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.09528","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":"sha256:1e6ac11535f6162095c4a5b1173fea5b510af459b481b1ecc03108553f0ce4ce","target":"record","created_at":"2026-05-18T01:04:05Z","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":"13347db59ee34f0318f987a0e3fbe707611d35696dbab6ccb49704145fbd37cc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2016-05-31T08:46:54Z","title_canon_sha256":"6860b947e30e465eac2b9c1003c982418fa7b408077d76d9f4c4add66d8e8e2d"},"schema_version":"1.0","source":{"id":"1605.09528","kind":"arxiv","version":1}},"canonical_sha256":"48192fac8a45e3f8fcce50239df8717868a88c8cf33b239af7a1ef04af0426d9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"48192fac8a45e3f8fcce50239df8717868a88c8cf33b239af7a1ef04af0426d9","first_computed_at":"2026-05-18T01:04:05.484902Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:04:05.484902Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xsQUafAxmK5Qkmq0VKIFySbO7I6XhVoOS6RK7Q02kSy6I/Bwz3qkwpSXqy4yOU8u6l4xzAQTWnY8I3OEVjGbCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:04:05.485444Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.09528","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1e6ac11535f6162095c4a5b1173fea5b510af459b481b1ecc03108553f0ce4ce","sha256:e8b17050dbbd93348fbe253ece07f346e610e24fb695732a78de48f7d5f568cc"],"state_sha256":"d1699da6de00b32aca78c191c3a4806d1e54fb4a33e16317803498b154a6ef82"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EiD02pI73DHyH/BmroVtl0eGsqrIgN9+NUAttEeUZCDAGmx5kl8tT7+yAsD4aVCeVdehgZxm1Y+/LTg456hsAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T08:35:18.618007Z","bundle_sha256":"0f32b0dc01a12d4dca01fee4bf0adf7b97689d705f714ba1a0c572c87a70e0b8"}}