Sivis, Murat

[["dc.bibliographiccitation.firstpage","288"],["dc.bibliographiccitation.lastpage","289"],["dc.contributor.author","Storeck, Gero"],["dc.contributor.author","Epp, Dennis"],["dc.contributor.author","Vogelgesang, Simon"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Schafer, Sascha"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2020-05-15T12:40:03Z"],["dc.date.available","2020-05-15T12:40:03Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1109/IVNC.2017.8051649"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/65459"],["dc.relation.eventend","2017-07-14"],["dc.relation.eventlocation","Regensburg"],["dc.relation.eventstart","2017-07-10"],["dc.relation.isbn","978-1-5090-3975-3"],["dc.relation.ispartof","2017 30th International Vacuum Nanoelectronics Conference (IVNC) : technical digest : Herzogsaal Regensburg, Germany, 10-14 July 2017"],["dc.title","Development of an ultrafast miniaturized pulsed electron gun"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","239"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Optica"],["dc.bibliographiccitation.lastpage","242"],["dc.bibliographiccitation.volume","3"],["dc.contributor.author","Zayko, Sergey"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Schäfer, Sascha"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2020-12-10T18:42:03Z"],["dc.date.available","2020-12-10T18:42:03Z"],["dc.date.issued","2016"],["dc.description.abstract","The optical polarization response of a structured material is one of its most significant properties, carrying information about microscopic anisotropies as well as chiral features and spin orientations. Polarization analysis is therefore a key element of imaging and spectroscopy techniques throughout the entire spectrum. In the case of extreme ultraviolet (EUV) radiation, however, both the preparation and detection of well-defined polarization states remain challenging. As a result, polarization-sensitive EUV microscopy based on table-top sources has not yet been realized, despite its great potential, for example, in nanoscale magnetic imaging. Here, we demonstrate polarization contrast in coherent diffractive imaging using high harmonic radiation and investigate the polarization properties of nanoscale transmission waveguides. We quantify the achievable polarization extinction ratio for different waveguide geometries and wavelengths. Our results demonstrate the utility of slab waveguides for efficient EUV polarization control and illustrate the importance of considering polarization contrast in the imaging of nanoscale structures. (C) 2016 Optical Society of America"],["dc.identifier.doi","10.1364/OPTICA.3.000239"],["dc.identifier.eissn","2334-2536"],["dc.identifier.isi","000372339500005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/77788"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","2334-2536"],["dc.title","Polarization contrast of nanoscale waveguides in high harmonic imaging"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","08012"],["dc.contributor.author","Feist, Armin"],["dc.contributor.author","Priebe, Katharina E."],["dc.contributor.author","Rathje, Christopher"],["dc.contributor.author","Bach, Nora"],["dc.contributor.author","Rubiano da Silva, Nara"],["dc.contributor.author","Danz, Thomas"],["dc.contributor.author","Möller, Marcel"],["dc.contributor.author","Domröse, Till"],["dc.contributor.author","Rittmann, Thomas"],["dc.contributor.author","Yalunin, Sergey Valerevich"],["dc.contributor.author","Hohage, Thorsten"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Schäfer, Sascha"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2020-05-15T12:39:40Z"],["dc.date.available","2020-05-15T12:39:40Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1051/epjconf/201920508012"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/65455"],["dc.relation.conference","XXI International Conference on Ultrafast Phenomena 2018 (UP 2018)"],["dc.relation.eventend","2018-07-20"],["dc.relation.eventlocation","Hamburg"],["dc.relation.eventstart","2018-07-15"],["dc.relation.ispartof","XXI International Conference on Ultrafast Phenomena 2018 (UP 2018)"],["dc.title","Generation and attosecond shaping of high coherence free-electron beams for ultrafast TEM"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","HW5C.4"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2019-11-28T10:09:33Z"],["dc.date.available","2019-11-28T10:09:33Z"],["dc.date.issued","2014"],["dc.description.abstract","We present a study of plasmon-enhanced gas excitation and extreme-ultraviolet (EUV) light generation in bow-tie antennas and tapered hollow waveguides. The observed EUV emission corresponds to incoherent atomic and ionic fluorescence without any sign from coherent highharmonic generation."],["dc.identifier.doi","10.1364/HILAS.2014.HW5C.4"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62691"],["dc.language.iso","en"],["dc.notes.preprint","yes"],["dc.relation.conference","High Intensity Lasers and High Field Phenomena"],["dc.relation.eventend","2014-03-20"],["dc.relation.eventlocation","Berlin"],["dc.relation.eventstart","2014-03-18"],["dc.relation.isbn","978-1-55752-996-1"],["dc.relation.iserratumof","yes"],["dc.title","Plasmon-enhanced extreme-ultraviolet light generation: Challenges and future perspectives"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","012108"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","AIP Advances"],["dc.bibliographiccitation.volume","2"],["dc.contributor.author","Broxtermann, Daniel"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Malindretos, Jörg"],["dc.contributor.author","Rizzi, Angela"],["dc.date.accessioned","2018-11-07T09:12:36Z"],["dc.date.available","2018-11-07T09:12:36Z"],["dc.date.issued","2012"],["dc.description.abstract","We have grown 2DEG AlGaN/GaN heterostructures by molecular beam epitaxy (MBE) with electron mobilities up to 21500 cm(2)V(-1)s(-1) at 2 K. In-situ RHEED was applied to optimize different aspects of Ga-rich growth. This paper gives a compact overview of the experimental key aspects that significantly affect the low temperature electron mobility in AlGaN/GaN heterostructures. Growth at the transition towards Ga droplet formation produced the best results. A quantitative analysis of the magnetoresistance confirmes scattering at dislocations as the dominant scattering process at low temperature. Copyright 2012 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. [doi: 10.1063/1.3679149]"],["dc.description.sponsorship","DFG [SFB 602]"],["dc.identifier.doi","10.1063/1.3679149"],["dc.identifier.fs","590413"],["dc.identifier.isi","000302225400026"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9558"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26975"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","2158-3226"],["dc.relation.orgunit","Fakultät für Physik"],["dc.title","MBE growth of high electron mobility 2DEGs in AlGaN/GaN heterostructures controlled by RHEED"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.lastpage","3"],["dc.contributor.author","Epp, Dennis"],["dc.contributor.author","Storeck, Gero"],["dc.contributor.author","Vogelgesang, Simon"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Schafer, Sascha"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2020-05-15T11:57:55Z"],["dc.date.available","2020-05-15T11:57:55Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1109/ESTC.2018.8546393"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/65454"],["dc.relation.conference","7th Electronic System-Integration Technology Conference (ESTC)"],["dc.relation.eventend","2018-09-21"],["dc.relation.eventlocation","Dresden"],["dc.relation.eventstart","2018-09-18"],["dc.relation.isbn","978-1-5386-6814-6"],["dc.relation.ispartof","2018 7th Electronic System-Integration Technology Conference (ESTC) : proceedings : 18th to 21st Sept. 2018, Dresden, Germany"],["dc.title","Ultrafast miniaturized pulsed electron gun for timeresolved surface measurements"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","19911"],["dc.bibliographiccitation.issue","15"],["dc.bibliographiccitation.journal","Optics Express"],["dc.bibliographiccitation.lastpage","19921"],["dc.bibliographiccitation.volume","23"],["dc.contributor.author","Zayko, Sergey"],["dc.contributor.author","Moennich, Eike"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Mai, Dong-Du"],["dc.contributor.author","Salditt, Tim"],["dc.contributor.author","Schaefer, Sascha"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2017-09-07T11:43:40Z"],["dc.date.available","2017-09-07T11:43:40Z"],["dc.date.issued","2015"],["dc.description.abstract","We study extreme-ultraviolet wave propagation within optically thick nanostructures by means of high-resolution coherent diffractive imaging using high-harmonic radiation. Exit waves from different objects are reconstructed by phase retrieval algorithms, and are shown to be dominated by waveguiding within the sample. The experiments provide a direct visualization of extreme-ultraviolet guided modes, and demonstrate that multiple scattering is a generic feature in extruded nanoscale geometries. The observations are successfully reproduced in numerical and semi-analytical simulations. (C) 2015 Optical Society of America"],["dc.identifier.doi","10.1364/OE.23.019911"],["dc.identifier.gro","3141860"],["dc.identifier.isi","000361035300131"],["dc.identifier.pmid","26367651"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/1878"],["dc.notes.intern","WoS Import 2017-03-10"],["dc.notes.status","final"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.issn","1094-4087"],["dc.relation.orgunit","Institut für Röntgenphysik"],["dc.relation.workinggroup","RG Salditt (Structure of Biomolecular Assemblies and X-Ray Physics)"],["dc.subject.gro","x-ray optics"],["dc.subject.gro","x-ray imaging"],["dc.title","Coherent diffractive imaging beyond the projection approximation: waveguiding at extreme ultraviolet wavelengths"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","eaao4641"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Science Advances"],["dc.bibliographiccitation.volume","3"],["dc.contributor.author","Kfir, Ofer"],["dc.contributor.author","Zayko, Sergey"],["dc.contributor.author","Nolte, Christina"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Möller, Marcel"],["dc.contributor.author","Hebler, Birgit"],["dc.contributor.author","Arekapudi, Sri Sai Phani Kanth"],["dc.contributor.author","Steil, Daniel"],["dc.contributor.author","Schäfer, Sascha"],["dc.contributor.author","Albrecht, Manfred"],["dc.contributor.author","Cohen, Oren"],["dc.contributor.author","Mathias, Stefan Dirk"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2019-11-28T10:23:22Z"],["dc.date.available","2019-11-28T10:23:22Z"],["dc.date.issued","2017"],["dc.description.abstract","This work demonstrates nanoscale magnetic imaging using bright circularly polarized high-harmonic radiation. We utilize the magneto-optical contrast of worm-like magnetic domains in a Co/Pd multilayer structure, obtaining quantitative amplitude and phase maps by lensless imaging. A diffraction-limited spatial resolution of 49 nm is achieved with iterative phase reconstruction enhanced by a holographic mask. Harnessing the exceptional coherence of high harmonics, this approach will facilitate quantitative, element-specific, and spatially resolved studies of ultrafast magnetization dynamics, advancing both fundamental and applied aspects of nanoscale magnetism."],["dc.identifier.doi","10.1126/sciadv.aao4641"],["dc.identifier.pmid","29250601"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62695"],["dc.language.iso","en"],["dc.relation.eissn","2375-2548"],["dc.relation.issn","2375-2548"],["dc.title","Nanoscale magnetic imaging using circularly polarized high-harmonic radiation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","FW4M.4"],["dc.contributor.author","Zayko, Sergey"],["dc.contributor.author","Kfir, Ofer"],["dc.contributor.author","Heigl, Michael"],["dc.contributor.author","Lohmann, Michael"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Albrecht, Manfred"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2020-05-15T11:57:49Z"],["dc.date.available","2020-05-15T11:57:49Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1364/CLEO_QELS.2019.FW4M.4"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/65453"],["dc.relation.conference","Conference on Lasers and Electro-Optics: Applications"],["dc.relation.eventend","2019-05-10"],["dc.relation.eventlocation","San Jose, California"],["dc.relation.eventstart","2019-05-05"],["dc.relation.isbn","978-1-943580-57-6"],["dc.relation.ispartof","CLEO: Applications and Technology : part of CLEO: 2019 : 5-10 May 2019, San Jose, California, United States"],["dc.title","Ultrafast Magnetic Microscopy using High-Harmonic Radiation"],["dc.type","conference_paper"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","184"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Nature Physics"],["dc.bibliographiccitation.lastpage","190"],["dc.bibliographiccitation.volume","14"],["dc.contributor.author","Vogelgesang, S."],["dc.contributor.author","Storeck, Gero"],["dc.contributor.author","Horstmann, J. G."],["dc.contributor.author","Diekmann, T."],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Schramm, S."],["dc.contributor.author","Rossnagel, K."],["dc.contributor.author","Schäfer, S."],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2019-11-28T10:30:29Z"],["dc.date.available","2019-11-28T10:30:29Z"],["dc.date.issued","2017"],["dc.description.abstract","We introduce ultrafast low-energy electron diffraction (ULEED) in backscattering for the study of structural dynamics at surfaces. Using a tip-based source of ultrashort electron pulses, we investigate the optically driven transition between charge density wave phases at the surface of 1T-TaS2. The large transfer width of the instrument allows us to employ spot-profile analysis, resolving the phase-ordering kinetics in the nascent incommensurate charge density wave phase. We observe a coarsening that follows a power-law scaling of the correlation length, driven by the annihilation of dislocation-type topological defects of the charge-ordered lattice. Our work opens up the study of a wide class of structural transitions and ordering phenomena at surfaces and in low-dimensional systems."],["dc.identifier.doi","10.1038/nphys4309"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62698"],["dc.language.iso","en"],["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","1745-2473"],["dc.relation.issn","1745-2481"],["dc.title","Phase ordering of charge density waves traced by ultrafast low-energy electron diffraction"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]