{"doi":"10.1109/jmw.2025.3603119","title":"Arbitrary Sub-THz Pulse Shaping via a Laser-Array-Driven InP-on-Sapphire Switch","abstract":"We present an amplitude modulator for high-power sub-terahertz radiation based on a laser-driven semiconductor switch capable of arbitrarily shaping pulse sequences with nanosecond time resolution. The core of the device is a photonic switch constructed from a 4 <inline-formula xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><tex-math notation=\"LaTeX\">$\\mu$</tex-math></inline-formula>m-thick epitaxially grown indium phosphide film bonded to a sapphire substrate. This switch is driven by an array of eight fiber-coupled 905 nm laser diodes, each delivering up to 125 W of peak power with programmable pulse durations ranging from 40 to 250 ns. By optimizing the semiconductor layer and substrate combination, we achieve a two-orders-of-magnitude reduction in the optical excitation fluence required for modulation, a key advancement that enables the use of compact and cost-effective laser diodes rather than high-power pulsed lasers traditionally required for such devices. The modulator was experimentally validated through a 240 GHz pulsed electron spin resonance experiment. The modulator also successfully operated with nearly 1 kW of sub-THz radiation without sustaining damage. Time-resolved reflectance measurements confirmed that the temporal structure of the laser pulses is faithfully imprinted onto the reflected sub-THz signal, demonstrating the system’s capability for flexible and precise pulse shaping at high frequencies.","journal":"IEEE Journal of Microwaves","year":2025,"id":581071,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":0,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9579,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2025-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1359077,"name":"Karl Rieger","orcid":"0009-0000-2300-2349","position":1,"is_corresponding":false},{"id":1492467,"name":"N. I. Agladze","orcid":"0000-0001-5871-6552","position":2,"is_corresponding":false},{"id":1492468,"name":"Qile Wu","orcid":"0000-0002-6218-3338","position":3,"is_corresponding":false},{"id":1009822,"name":"Brad D. Price","orcid":"0000-0002-2674-4206","position":4,"is_corresponding":false},{"id":1492469,"name":"Bei Shi","orcid":"0000-0003-3453-2358","position":5,"is_corresponding":false},{"id":1492470,"name":"Seamus O’Hara","orcid":"0000-0001-7650-8589","position":6,"is_corresponding":false},{"id":1492779,"name":"Joe Costello","orcid":null,"position":7,"is_corresponding":false},{"id":1492780,"name":"Jonathan Klamkin","orcid":null,"position":8,"is_corresponding":false},{"id":1492471,"name":"Marzieh Kavand","orcid":"0009-0001-1546-3636","position":9,"is_corresponding":false},{"id":795836,"name":"Catherine Nguyen","orcid":null,"position":10,"is_corresponding":false},{"id":1492472,"name":"Garrett D. Cole","orcid":"0000-0001-7149-3218","position":11,"is_corresponding":false},{"id":823530,"name":"Thorsten Maly","orcid":"0000-0002-0785-4127","position":12,"is_corresponding":false},{"id":991947,"name":"Mark S. Sherwin","orcid":"0000-0002-3869-1893","position":13,"is_corresponding":false},{"id":1301739,"name":"Antonín Sojka","orcid":"0000-0002-6426-262X","position":0,"is_corresponding":true}],"reference_count":37,"raw_metadata":null,"created_at":"2026-07-19T02:58:47.357782Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}