000310785 001__ 310785 000310785 005__ 20250730111003.0 000310785 0247_ $$2doi$$a10.1364/OPTICA.3.001209 000310785 0247_ $$2datacite_doi$$a10.3204/PUBDB-2016-04408 000310785 0247_ $$2arXiv$$aarXiv:1605.06667 000310785 0247_ $$2WOS$$aWOS:000388975200010 000310785 0247_ $$2altmetric$$aaltmetric:13875649 000310785 0247_ $$2inspire$$ainspire:1464892 000310785 0247_ $$2openalex$$aopenalex:W3104833000 000310785 037__ $$aPUBDB-2016-04408 000310785 041__ $$aEnglish 000310785 082__ $$a530 000310785 088__ $$2arXiv$$aarXiv:1605.06667 000310785 0881_ $$aarXiv:1605.06667 000310785 1001_ $$0P:(DE-H253)PIP1017807$$aHuang, Wenqian$$b0$$eCorresponding author 000310785 245__ $$aTerahertz-driven, all-optical electron gun 000310785 260__ $$aWashington, DC$$bOSA$$c2016 000310785 3367_ $$2DRIVER$$aarticle 000310785 3367_ $$2DataCite$$aOutput Types/Journal article 000310785 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1484670851_10803 000310785 3367_ $$2BibTeX$$aARTICLE 000310785 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000310785 3367_ $$00$$2EndNote$$aJournal Article 000310785 520__ $$aUltrashort electron beams with a narrow energy spread, high charge, and low jitter are essential for resolving phase transitions in metals, semiconductors, and molecular crystals. These accelerated beams, produced by phototriggered electron guns, are also injected into accelerators for x-ray light sources. The achievable resolution of these time-resolved electron diffraction or x-ray experiments has been hindered by surface field and timing jitter limitations in conventional RF guns, which thus far are <200 MV/m and >96 fs, respectively. A gun driven by optically generated single-cycle terahertz (THz) pulses provides a practical solution for enabling not only GV/m surface fields but also absolute timing stability, since the pulses are generated by the same laser as the phototrigger. Here, we demonstrate an all-optical THz gun yielding a peak electron energy approaching 1 keV, accelerated by >300 MV/m THz fields in a micrometer-scale waveguide structure. We also achieve quasi-monoenergetic, sub-kiloelectron volt bunches with 32 fC of charge, which can already be used for time-resolved low-energy electron diffraction. Such ultracompact, easy-to-implement guns—driven by intrinsically synchronized THz pulses that are pumped by an amplified arm of the already-present photoinjector laser—provide a new tool with the potential to transform accelerator-based science. 000310785 536__ $$0G:(DE-HGF)POF3-631$$a631 - Accelerator R & D (POF3-631)$$cPOF3-631$$fPOF III$$x0 000310785 536__ $$0G:(EU-Grant)609920$$aAXSIS - Frontiers in Attosecond X-ray Science: Imaging and Spectroscopy (609920)$$c609920$$fERC-2013-SyG$$x1 000310785 536__ $$0G:(GEPRIS)194651731$$aCUI - Hamburger Zentrum für ultraschnelle Beobachtung (194651731)$$c194651731$$x2 000310785 588__ $$aDataset connected to CrossRef 000310785 693__ $$0EXP:(DE-H253)CFEL-Exp-20150101$$5EXP:(DE-H253)CFEL-Exp-20150101$$eExperiments at CFEL$$x0 000310785 7001_ $$0P:(DE-H253)PIP1017124$$aFallahi, Arya$$b1 000310785 7001_ $$0P:(DE-H253)PIP1020433$$aWu, Xiaojun$$b2 000310785 7001_ $$0P:(DE-H253)PIP1015195$$aCankaya, Huseyin$$b3 000310785 7001_ $$0P:(DE-H253)PIP1014959$$aCalendron, Anne-Laure$$b4 000310785 7001_ $$0P:(DE-H253)PIP1019059$$aRavi, Koustuban$$b5 000310785 7001_ $$0P:(DE-H253)PIP1011712$$aZhang, Dongfang$$b6 000310785 7001_ $$0P:(DE-HGF)0$$aNanni, Emilio A.$$b7 000310785 7001_ $$0P:(DE-HGF)0$$aHong, Kyung-Han$$b8 000310785 7001_ $$0P:(DE-H253)PIP1013198$$aKärtner, Franz X.$$b9$$eCorresponding author 000310785 773__ $$0PERI:(DE-600)2779175-0$$a10.1364/OPTICA.3.001209$$gVol. 3, no. 11, p. 1209 -$$n11$$p1209 - 1212$$tOptica$$v3$$x2334-2536$$y2016 000310785 8564_ $$uhttps://bib-pubdb1.desy.de/record/310785/files/Huang%2C%20Optica%203%20%282016%29%201209.pdf$$yPublished on 2016-10-24. Available in OpenAccess from 2017-10-24. 000310785 8564_ $$uhttps://bib-pubdb1.desy.de/record/310785/files/Huang%2C%20Optica%203%20%282016%29%201209.gif?subformat=icon$$xicon$$yPublished on 2016-10-24. Available in OpenAccess from 2017-10-24. 000310785 8564_ $$uhttps://bib-pubdb1.desy.de/record/310785/files/Huang%2C%20Optica%203%20%282016%29%201209.jpg?subformat=icon-1440$$xicon-1440$$yPublished on 2016-10-24. Available in OpenAccess from 2017-10-24. 000310785 8564_ $$uhttps://bib-pubdb1.desy.de/record/310785/files/Huang%2C%20Optica%203%20%282016%29%201209.jpg?subformat=icon-180$$xicon-180$$yPublished on 2016-10-24. Available in OpenAccess from 2017-10-24. 000310785 8564_ $$uhttps://bib-pubdb1.desy.de/record/310785/files/Huang%2C%20Optica%203%20%282016%29%201209.jpg?subformat=icon-640$$xicon-640$$yPublished on 2016-10-24. 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