Strauch, Stefanie

[["dc.bibliographiccitation.firstpage","63"],["dc.bibliographiccitation.journal","Ultramicroscopy"],["dc.bibliographiccitation.lastpage","73"],["dc.bibliographiccitation.volume","176"],["dc.contributor.author","Feist, Armin"],["dc.contributor.author","Bach, Nora"],["dc.contributor.author","da Silva, Nara Rubiano"],["dc.contributor.author","Danz, Thomas"],["dc.contributor.author","Möller, Marcel"],["dc.contributor.author","Priebe, Katharina E."],["dc.contributor.author","Domröse, Till"],["dc.contributor.author","Gatzmann, J. Gregor"],["dc.contributor.author","Rost, Stefan"],["dc.contributor.author","Schauss, Jakob"],["dc.contributor.author","Strauch, Stefanie"],["dc.contributor.author","Bormann, Reiner"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Schäfer, Sascha"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2018-11-07T10:23:59Z"],["dc.date.accessioned","2020-02-03T09:08:33Z"],["dc.date.available","2018-11-07T10:23:59Z"],["dc.date.available","2020-02-03T09:08:33Z"],["dc.date.issued","2017"],["dc.description.abstract","We present the development of the first ultrafast transmission electron microscope (UTEM) driven by localized photoemission from a field emitter cathode. We describe the implementation of the instrument, the photoemitter concept and the quantitative electron beam parameters achieved. Establishing a new source for ultrafast TEM, the Göttingen UTEM employs nano-localized linear photoemission from a Schottky emitter, which enables operation with freely tunable temporal structure, from continuous wave to femtosecond pulsed mode. Using this emission mechanism, we achieve record pulse properties in ultrafast electron microscopy of 9Å focused beam diameter, 200fs pulse duration and 0.6eV energy width. We illustrate the possibility to conduct ultrafast imaging, diffraction, holography and spectroscopy with this instrument and also discuss opportunities to harness quantum coherent interactions between intense laser fields and free-electron beams."],["dc.identifier.arxiv","1611.05022v1"],["dc.identifier.doi","10.1016/j.ultramic.2016.12.005"],["dc.identifier.isi","000403992200010"],["dc.identifier.pmid","28139341"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/42570"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62933"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A05 Nanoskalige Untersuchung raumzeitlicher Relaxation in heterogenen Systemen mit ultraschneller Transmissionselektronenmikroskopie"],["dc.relation.eissn","1879-2723"],["dc.relation.issn","0304-3991"],["dc.rights","CC BY-NC-ND 4.0"],["dc.title","Ultrafast transmission electron microscopy using a laser-driven field emitter: Femtosecond resolution with a high coherence electron beam"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","085104"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","Review of Scientific Instruments"],["dc.bibliographiccitation.volume","82"],["dc.contributor.author","Liu, Fei"],["dc.contributor.author","Strauch, Stefanie"],["dc.contributor.author","Horton, Robert"],["dc.contributor.author","Evans, Russell"],["dc.contributor.author","Hwang, David"],["dc.date.accessioned","2018-11-07T08:53:29Z"],["dc.date.available","2018-11-07T08:53:29Z"],["dc.date.issued","2011"],["dc.description.abstract","Electromagnetic interference (EMI) is a common problem in a high-power pulsed infrared laser measurement. In order to eliminate susceptibility to radiated EMI, we developed, tested and implemented an infrared power measurement system using a high-speed analog fiber-optic link. Key components are commercially available parts designed for high-speed digital data transmission, but can be operated in analog mode. We successfully utilized the system for time-resolved measurements of high-power transversely-excited atmospheric-pressure CO(2) lasers in amplifier and oscillator configurations. This paper presents experimental setup, testing results, and the details of the laser power measurements results. (C) 2011 American Institute of Physics. [doi:10.1063/1.3624628]"],["dc.description.sponsorship","U.S. Department of Energy (DOE) [DE-SC0005001]"],["dc.identifier.doi","10.1063/1.3624628"],["dc.identifier.isi","000294486600047"],["dc.identifier.pmid","21895272"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/22421"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Inst Physics"],["dc.relation.issn","0034-6748"],["dc.title","High-speed analog fiber-optic link for electromagnetic interference suppression in infrared power measurement"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","173105"],["dc.bibliographiccitation.issue","17"],["dc.bibliographiccitation.journal","Journal of Applied Physics"],["dc.bibliographiccitation.volume","118"],["dc.contributor.author","Bormann, Reiner"],["dc.contributor.author","Strauch, Stefanie"],["dc.contributor.author","Schäfer, Sascha"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2018-11-07T09:49:01Z"],["dc.date.available","2018-11-07T09:49:01Z"],["dc.date.issued","2015"],["dc.description.abstract","We experimentally and numerically investigate the performance of an advanced ultrafast electron source, based on two-photon photoemission from a tungsten needle cathode incorporated in an electron microscope gun geometry. Emission properties are characterized as a function of the electrostatic gun settings, and operating conditions leading to laser-triggered electron beams of very low emittance (below 20 nm mrad) are identified. The results highlight the excellent suitability of optically driven nano-cathodes for the further development of ultrafast transmission electron microscopy. (C) 2015 AIP Publishing LLC."],["dc.identifier.doi","10.1063/1.4934681"],["dc.identifier.isi","000364584200005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/35426"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A05 Nanoskalige Untersuchung raumzeitlicher Relaxation in heterogenen Systemen mit ultraschneller Transmissionselektronenmikroskopie"],["dc.relation.issn","1089-7550"],["dc.relation.issn","0021-8979"],["dc.title","An ultrafast electron microscope gun driven by two-photon photoemission from a nanotip cathode"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","014301"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Structural Dynamics"],["dc.bibliographiccitation.volume","6"],["dc.contributor.author","Bach, Nora"],["dc.contributor.author","Domröse, Till"],["dc.contributor.author","Feist, Armin"],["dc.contributor.author","Rittmann, Thomas"],["dc.contributor.author","Strauch, Stefanie"],["dc.contributor.author","Ropers, Claus"],["dc.contributor.author","Schäfer, Sascha"],["dc.date.accessioned","2019-11-15T10:45:49Z"],["dc.date.available","2019-11-15T10:45:49Z"],["dc.date.issued","2019-01"],["dc.description.abstract","Tip-based photoemission electron sources offer unique properties for ultrafast imaging, diffraction, and spectroscopy experiments with highly coherent few-electron pulses. Extending this approach to increased bunch-charges requires a comprehensive experimental study on Coulomb interactions in nanoscale electron pulses and their impact on beam quality. For a laser-driven Schottky field emitter, we assess the transverse and longitudinal electron pulse properties in an ultrafast transmission electron microscope at a high photoemission current density. A quantitative characterization of electron beam emittance, pulse duration, spectral bandwidth, and chirp is performed. Due to the cathode geometry, Coulomb interactions in the pulse predominantly occur in the direct vicinity to the tip apex, resulting in a well-defined pulse chirp and limited emittance growth. Strategies for optimizing electron source parameters are identified, enabling advanced ultrafast transmission electron microscopy approaches, such as phase-resolved imaging and holography."],["dc.identifier.doi","10.1063/1.5066093"],["dc.identifier.pmid","30868085"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62632"],["dc.language.iso","en"],["dc.relation.issn","2329-7778"],["dc.title","Coulomb interactions in high-coherence femtosecond electron pulses from tip emitters"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]