Prof. Dr. Sascha Schäfer

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  • 2020 | Preprint
    ​ ​High-purity free-electron momentum states prepared by three-dimensional optical phase modulation​
    Feist, A. ; Yalunin, S. V. ; Schäfer, S.  & Ropers, C. ​ (2020)
    ​Details  arXiv 
  • 2020 | Journal Article
    ​ ​Strong-field nano-optics​
    Dombi, P.; Pápa, Z.; Vogelsang, J.; Yalunin, S. V. ; Sivis, M. ; Herink, G.   & Schäfer, S.  et al.​ (2020) 
    Reviews of Modern Physics, 92(2).​ DOI: https://doi.org/10.1103/RevModPhys.92.025003 
    ​Details  DOI 
  • 2019 | Journal Article
    ​ ​Coulomb interactions in high-coherence femtosecond electron pulses from tip emitters​
    Bach, N. ; Domröse, T.; Feist, A. ; Rittmann, T.; Strauch, S. ; Ropers, C.   & Schäfer, S. ​ (2019) 
    Structural Dynamics, 6(1) pp. 014301​.​ DOI: https://doi.org/10.1063/1.5066093 
    ​Details  DOI  PMID  PMC 
  • 2019 | Journal Article
    ​ ​Femtosecond Lorentz Microscopy for the Mapping of Ultrafast Magnetization Dynamics​
    Rubiano da Silva, N. ; Möller, M. ; Feist, A. ; Ulrichs, H. ; Ropers, C.   & Schäfer, S. ​ (2019) 
    Microscopy and Microanalysis, 25(S2) pp. 38​-39​.​ DOI: https://doi.org/10.1017/S1431927619000928 
    ​Details  DOI 
  • 2019 | Journal Article
    ​ ​Nanoscale Structural Dynamics Probed by Coherent Ultrafast TEM​
    Feist, A. ; Danz, T. ; Rubiano da Silva, N. ; Vogelgesang, S. ; Bach, N. ; Domröse, T. & Schäfer, S.  et al.​ (2019) 
    Microscopy and Microanalysis, 25(S2) pp. 1648​-1649​.​ DOI: https://doi.org/10.1017/S1431927619008973 
    ​Details  DOI 
  • 2019 | Conference Paper
    ​ ​Probing Nanoscale Optical Fields and Phase-Shaping Electron Beams by Inelastic Electron-Light Scattering​
    Feist, A. ; Rittmann, T.; Harvey, T.; Priebe, K. E. ; Rathje, C.; Kfir, O. & Henke, J.-W.  et al.​ (2019)
    pp. 1​-1. ​2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)​, München. DOI: https://doi.org/10.1109/CLEOE-EQEC.2019.8872437 
    ​Details  DOI 
  • 2019 | Conference Paper | 
    ​ ​Generation and attosecond shaping of high coherence free-electron beams for ultrafast TEM​
    Feist, A. ; Priebe, K. E. ; Rathje, C.; Bach, N. ; Rubiano da Silva, N. ; Danz, T.   & Möller, M.  et al.​ (2019)
    ​XXI International Conference on Ultrafast Phenomena 2018 (UP 2018). ​XXI International Conference on Ultrafast Phenomena 2018 (UP 2018)​, Hamburg. DOI: https://doi.org/10.1051/epjconf/201920508012 
    ​Details  DOI 
  • 2018 | Journal Article
    ​ ​Structural dynamics probed by high-coherence electron pulses​
    Feist, A. ; Storeck, G. ; Schäfer, S.   & Ropers, C. ​ (2018) 
    MRS Bulletin, 43(7) pp. 504​-511​.​ DOI: https://doi.org/10.1557/mrs.2018.153 
    ​Details  DOI 
  • 2018 | Conference Paper
    ​ ​Quantum Coherent Transverse and Longitudinal Control for Attosecond Shaping of Free Electron Beams​
    Feist, A. ; Priebe, K. E. ; Rathje, C.; Rittmann, T.; Yalunin, S. V. ; Hohage, T.   & Schäfer, S.  et al.​ (2018)
    ​CLEO: QELS_Fundamental Science, part of CLEO: 2018 : 13-18 May 2018, San Jose, California, United States. ​CLEO: QELS_Fundamental Science 2018​, San Jose, California United States.
    Washington, D.C.​: OSA - The Optical Society. DOI: https://doi.org/10.1364/CLEO_QELS.2018.FM4F.1 
    ​Details  DOI 
  • 2018 | Journal Article
    ​ ​Ultrafast Transmission Electron Microscopy with High-Coherence Electron Pulses​
    Harvey, T.; Feist, A. ; Möller, M. ; Rubiano da Silva, N. ; Bach, N. ; Domröse, T. & Danz, T.  et al.​ (2018) 
    Microscopy and Microanalysis, 24(S1) pp. 2006​-2007​.​ DOI: https://doi.org/10.1017/S1431927618010516 
    ​Details  DOI 
  • 2018 | Journal Article | 
    ​ ​The CARMENES search for exoplanets around M dwarfs​
    Reiners, A. ; Zechmeister, M. ; Caballero, J. A.; Ribas, I.; Morales, J. C.; Jeffers, S. V.   & Schöfer, P. et al.​ (2018) 
    Astronomy and Astrophysics, 612 art. A49​.​ DOI: https://doi.org/10.1051/0004-6361/201732054 
    ​Details  DOI 
  • 2018 | Journal Article
    ​ ​Nanoscale diffractive probing of strain dynamics in ultrafast transmission electron microscopy​
    Feist, A. ; Rubiano da Silva, N. ; Liang, W.; Ropers, C.   & Schäfer, S. ​ (2018) 
    Structural Dynamics, 5(1) art. 014302​.​ DOI: https://doi.org/10.1063/1.5009822 
    ​Details  DOI  PMID  PMC  arXiv 
  • 2017 | Journal Article
    ​ ​Ultrafast sublattice pseudospin relaxation in graphene probed by polarization-resolved photoluminescence​
    Danz, T. ; Neff, A.; Gaida, J. H.; Bormann, R. ; Ropers, C.   & Schäfer, S. ​ (2017) 
    Physical Review. B, 95(24) art. 241412​.​ DOI: https://doi.org/10.1103/PhysRevB.95.241412 
    ​Details  DOI  WoS 
  • 2017 | Journal Article | Research Paper
    ​ ​Attosecond electron pulse trains and quantum state reconstruction in ultrafast transmission electron microscopy​
    Priebe, K. E. ; Rathje, C.; Yalunin, S. V. ; Hohage, T. ; Feist, A. ; Schäfer, S.   & Ropers, C. ​ (2017) 
    Nature Photonics, 11(12) pp. 793​-797​.​ DOI: https://doi.org/10.1038/s41566-017-0045-8 
    ​Details  DOI  arXiv 
  • 2017 | Conference Paper
    ​ ​Controlling the quantum state of free electrons by inelastic optical near-field scattering​
    Priebe, K. E. ; Yalunin, S. V. ; Rathje, C.; Feist, A. ; Schäfer, S.   & Ropers, C. ​ (2017)
    ​2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) pp. 1​-1. ​2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)​, Munich, Germany.
    IEEE. DOI: https://doi.org/10.1109/CLEOE-EQEC.2017.8087599 
    ​Details  DOI 
  • 2017 | Conference Paper
    ​ ​Highly coherent femtosecond electron pulses for ultrafast transmission electron microscopy​
    Bach, N. ; Feist, A. ; Domröse, T.; Möller, M. ; Rubiano da Silva, N. ; Danz, T.   & Schäfer, S.  et al.​ (2017)
    ​30th International Vacuum Nanoelectronics Conference (IVNC) pp. 80​-81. ​2017 30th International Vacuum Nanoelectronics Conference (IVNC)​, Regensburg, Germany.
    IEEE. DOI: https://doi.org/10.1109/IVNC.2017.8051554 
    ​Details  DOI 
  • 2017 | Journal Article | Research Paper
    ​ ​Light-Induced Metastable Magnetic Texture Uncovered by in situ Lorentz Microscopy​
    Eggebrecht, T.; Möller, M. ; Gatzmann, J. G. ; Rubiano da Silva, N. ; Feist, A. ; Martens, U. & Ulrichs, H.  et al.​ (2017) 
    Physical Review Letters, 118(9) art. 097203​.​ DOI: https://doi.org/10.1103/PhysRevLett.118.097203 
    ​Details  DOI  PMID  PMC  arXiv 
  • 2017 | Journal Article | Research Paper
    ​ ​Ultrafast transmission electron microscopy using a laser-driven field emitter: Femtosecond resolution with a high coherence electron beam​
    Feist, A. ; Bach, N. ; da Silva, N. R. ; Danz, T. ; Möller, M. ; Priebe, K. E.   & Domröse, T. et al.​ (2017) 
    Ultramicroscopy, 176 pp. 63​-73​.​ DOI: https://doi.org/10.1016/j.ultramic.2016.12.005 
    ​Details  DOI  PMID  PMC  WoS  arXiv 
  • 2017 | Journal Article
    ​ ​Nanoscale magnetic imaging using circularly polarized high-harmonic radiation​
    Kfir, O.; Nolte, C.; Hebler, B.; Arekapudi, S. S. P. K.; Steil, D.; Albrecht, M. & Cohen, O. et al.​ (2017) 
    Science Advances, 3(12) art. eaao4641​.​ DOI: https://doi.org/10.1126/sciadv.aao4641 
    ​Details  DOI  PMID  PMC  WoS 
  • 2017 | Journal Article | 
    ​ ​Nanotip-based photoelectron microgun for ultrafast LEED​
    Storeck, G. ; Vogelgesang, S. ; Sivis, M. ; Schäfer, S.   & Ropers, C. ​ (2017) 
    Structural Dynamics, 4(4) art. 044024​.​ DOI: https://doi.org/10.1063/1.4982947 
    ​Details  DOI  PMID  PMC  WoS 
  • 2016 | Journal Article
    ​ ​Polarization contrast of nanoscale waveguides in high harmonic imaging​
    Zayko, S. ; Sivis, M. ; Schäfer, S.   & Ropers, C. ​ (2016) 
    Optica, 3(3) pp. 239​-242​.​ DOI: https://doi.org/10.1364/OPTICA.3.000239 
    ​Details  DOI  WoS 
  • 2016 | Conference Paper
    ​ ​Optically induced nanoscale networks of topological magnetic defects​
    Eggebrecht, T.; Möller, M. ; Gatzmann, J. G. ; Rubiano da Silva, N. ; Feist, A. ; Martens, U. & Ulrichs, H.  et al.​ (2016)
    ​Proceedings of the International Conference on Ultrafast Phenomena 2016. ​International Conference on Ultrafast Phenomena 2016​, Santa Fe, New Mexico United States.
    Washington, D.C.​: OSA - The Optical Society. DOI: https://doi.org/10.1364/UP.2016.UTh4A.44 
    ​Details  DOI 
  • 2016 | Conference Paper
    ​ ​Spatio-Temporal Probing of Lattice Dynamics in Graphite by Ultrafast TEM​
    Feist, A. ; Rubiano da Silva, N. ; Liang, W.; Ropers, C.   & Schäfer, S. ​ (2016)
    ​Proceedings of the 16th European Microscopy Congress pp. 330​-331. ​16th European Microscopy Congress​, Lyon, France.
    Lyon​: European Microscopy Society. DOI: https://doi.org/10.1002/9783527808465.EMC2016.5965 
    ​Details  DOI 
  • 2016 | Conference Paper
    ​ ​Quantum coherent control of free electrons by optical near-fields in an ultrafast electron microscope​
    Feist, A. ; Echternkamp, K. E.; Sivis, M. ; Schäfer, S.   & Ropers, C. ​ (2016)
    ​International Conference on Ultrafast Phenomena 2016. ​International Conference on Ultrafast Phenomena 2016​, Santa Fe, New Mexico United States. DOI: https://doi.org/10.1364/UP.2016.UTu5A.2 
    ​Details  DOI 
  • 2016 | Conference Paper
    ​ ​Few-nanometer femtosecond electron probe pulses in ultrafast transmission electron microscop​
    Feist, A. ; Echternkamp, K. E.; Bormann, R. ; Rubiano da Silva, N. ; Möller, M. ; Liang, W. & Schäfer, S.  et al.​ (2016)
    ​Proceedings of the International Conference on Ultrafast Phenomena 2016. ​International Conference on Ultrafast Phenomena 2016​, Santa Fe, New Mexico United States.
    Washington, D.C.​: OSA - The Optical Society. DOI: https://doi.org/10.1364/up.2016.uth2b.5 
    ​Details  DOI 
  • 2016 | Journal Article | Research Paper
    ​ ​Strong-field photoemission in nanotip near-fields: from quiver to sub-cycle electron dynamics​
    Echternkamp, K. E.; Herink, G.; Yalunin, S. V.; Rademann, K.; Schaefer, S.   & Ropers, C. ​ (2016) 
    Applied Physics B, 122(4) art. UNSP 80​.​ DOI: https://doi.org/10.1007/s00340-016-6351-x 
    ​Details  DOI  WoS 
  • 2016 | Journal Article | Research Paper | 
    ​ ​Ramsey-type phase control of free-electron beams​
    Echternkamp, K. E.; Feist, A. ; Schäfer, S.   & Ropers, C. ​ (2016) 
    Nature Physics, 12(11) pp. 1000​-1004​.​ DOI: https://doi.org/10.1038/nphys3844 
    ​Details  DOI  WoS 
  • 2015 | Journal Article | Research Paper
    ​ ​Coherent diffractive imaging beyond the projection approximation: waveguiding at extreme ultraviolet wavelengths​
    Zayko, S. ; Moennich, E.; Sivis, M. ; Mai, D.-D.; Salditt, T. ; Schaefer, S.   & Ropers, C. ​ (2015) 
    Optics Express, 23(15) pp. 19911​-19921​.​ DOI: https://doi.org/10.1364/OE.23.019911 
    ​Details  DOI  PMID  PMC  WoS 
  • 2015 | Journal Article | Research Paper
    ​ ​An ultrafast electron microscope gun driven by two-photon photoemission from a nanotip cathode​
    Bormann, R. ; Strauch, S. ; Schäfer, S.   & Ropers, C. ​ (2015) 
    Journal of Applied Physics, 118(17) art. 173105​.​ DOI: https://doi.org/10.1063/1.4934681 
    ​Details  DOI  WoS 
  • 2015 | Journal Article | Research Paper
    ​ ​An ultrafast nanotip electron gun triggered by grating-coupled surface plasmons​
    Schroeder, B. ; Sivis, M. ; Bormann, R. ; Schäfer, S.   & Ropers, C. ​ (2015) 
    Applied Physics Letters, 107(23) art. 231105​.​ DOI: https://doi.org/10.1063/1.4937121 
    ​Details  DOI  WoS 
  • 2015 | Journal Article
    ​ ​Transits and starspots in the WASP-6 planetary system​
    Tregloan-Reed, J.; Southworth, J.; Burgdorf, M. J.; Novati, S. C.; Dominik, M.; Finet, F. & Jorgensen, U. G. et al.​ (2015) 
    Monthly Notices of the Royal Astronomical Society, 450(2) pp. 1760​-1769​.​ DOI: https://doi.org/10.1093/mnras/stv730 
    ​Details  DOI  WoS 
  • 2015 | Conference Paper
    ​ ​Quantum coherent interaction of electrons with optical near-fields in an ultrafast electron microscope​
    Feist, A. ; Echternkamp, K. E.; Schauss, J.; Yalunin, S. V. ; Schäfer, S.   & Ropers, C. ​ (2015)
    ​2015 Photonics North​ DOI: https://doi.org/10.1109/PN.2015.7292467 
    ​Details  DOI 
  • 2015 | Journal Article | Research Paper
    ​ ​Real-space imaging of nanotip plasmons using electron energy loss spectroscopy​
    Schroeder, B. ; Weber, T.; Yalunin, S. V. ; Kiel, T.; Matyssek, C.; Sivis, M.   & Schäfer, S.  et al.​ (2015) 
    Physical Review. B, 92(8) art. 085411​.​ DOI: https://doi.org/10.1103/PhysRevB.92.085411 
    ​Details  DOI  WoS 
  • 2015 | Journal Article
    ​ ​Ultrafast Transmission Electron Microscopy with nanoscale Photoemitters​
    Feist, A. ; Echternkamp, K. E.; Schauss, J.; Yalunin, S. V. ; Schäfer, S.   & Ropers, C. ​ (2015) 
    Microscopy and Microanalysis, 21(S3) pp. 1203​-1204​.​ DOI: https://doi.org/10.1017/S1431927615006807 
    ​Details  DOI 
  • 2015 | Conference Paper
    ​ ​Electron-Light Interaction in Optical Near-Fields studied by Ultrafast Transmission Electron Microscopy​
    Feist, A. ; Echternkamp, K. E.; Schauss, J.; Yalunin, S. V. ; Schäfer, S.   & Ropers, C. ​ (2015)
    ​2015 Conference on Lasers and Electro-Optics (CLEO). ​2015 Conference on Lasers and Electro-Optics (CLEO)​, San Jose, CA, USA.
    IEEE. DOI: https://doi.org/10.1364/CLEO_QELS.2015.FTh1E.3 
    ​Details  DOI 
  • 2015 | Journal Article | Research Paper
    ​ ​Quantum coherent optical phase modulation in an ultrafast transmission electron microscope​
    Feist, A. ; Echternkamp, K. E.; Schauss, J.; Yalunin, S. V. ; Schäfer, S.   & Ropers, C. ​ (2015) 
    Nature, 521(7551) pp. 200​-+​.​ DOI: https://doi.org/10.1038/nature14463 
    ​Details  DOI  PMID  PMC  WoS 
  • 2014 | Journal Article
    ​ ​High-precision photometry by telescope defocussing - VI. WASP-24, WASP-25 and WASP-26​
    Southworth, J.; Hinse, T. C.; Burgdorf, M. J.; Novati, S. C.; Dominik, M.; Galianni, P. & Gerner, T. et al.​ (2014) 
    Monthly Notices of the Royal Astronomical Society, 444(1) pp. 776​-789​.​ DOI: https://doi.org/10.1093/mnras/stu1492 
    ​Details  DOI  WoS 
  • 2014 | Journal Article
    ​ ​In-Situ Lorentz Microscopy with Femtosecond Optical Illumination​
    Gatzmann, J. G. ; Eggebrecht, T.; Feist, A. ; Zbarsky, V.; Münzenberg, M. ; Ropers, C.   & Schäfer, S. ​ (2014) 
    Microscopy and Microanalysis, 20(S3) pp. 1578​-1579​.​ DOI: https://doi.org/10.1017/S1431927614009623 
    ​Details  DOI 
  • 2013 | Journal Article
    ​ ​Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry​
    Mancini, L.; Ciceri, S.; Chen, G.; Tregloan-Reed, J.; Fortney, J. J.; Southworth, J. & Tan, T. G. et al.​ (2013) 
    Monthly Notices of the Royal Astronomical Society, 436(1) pp. 2​-18​.​ DOI: https://doi.org/10.1093/mnras/stt1394 
    ​Details  DOI  WoS 
  • 2013 | Journal Article | 
    ​ ​Flux and color variations of the doubly imaged quasar UM673​
    Ricci, D.; Elyiv, A.; Finet, F.; Wertz, O.; Alsubai, K. A.; Anguita, T. & Bozza, V. et al.​ (2013) 
    Astronomy and Astrophysics, 551 art. A104​.​ DOI: https://doi.org/10.1051/0004-6361/201118755 
    ​Details  DOI  WoS 
  • 2013 | Journal Article | 
    ​ ​The transiting system GJ1214: high-precision defocused transit observations and a search for evidence of transit timing variation​
    Harpsoe, K. B. W.; Hardis, S.; Hinse, T. C.; Jorgensen, G.; Mancini, L.; Southworth, J. & Alsubai, K. A. et al.​ (2013) 
    Astronomy and Astrophysics, 549 art. A10​.​ DOI: https://doi.org/10.1051/0004-6361/201219996 
    ​Details  DOI  WoS 
  • 2013 | Journal Article
    ​ ​Practice-based clinical evaluation of metalceramic and zirconia molar crowns: 3-year results​
    Rinke, S.; Schäfer, S. ; Lange, K.; Gersdorff, N. & Roediger, M.​ (2013) 
    Journal of Oral Rehabilitation, 40(3) pp. 228​-237​.​ DOI: https://doi.org/10.1111/joor.12018 
    ​Details  DOI  PMID  PMC  WoS 

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