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@ARTICLE{Eickhoff:454376,
      author       = {Eickhoff, K. and Rathje, C. and Köhnke, D. and Kerbstadt,
                      S. and Englert, L. and Bayer, T. and Schäfer, S. and
                      Wollenhaupt, M.},
      title        = {{O}rbital angular momentum superposition states in
                      transmission electron microscopy and bichromatic multiphoton
                      ionization},
      journal      = {New journal of physics},
      volume       = {22},
      number       = {10},
      issn         = {1367-2630},
      address      = {[London]},
      publisher    = {IOP},
      reportid     = {PUBDB-2021-00461},
      pages        = {103045},
      year         = {2020},
      abstract     = {The coherent control of electron beams and ultrafast
                      electron wave packet dynamics have attracted significant
                      attention in electron microscopy as well as in atomic
                      physics. In order to unify the conceptual pictures developed
                      in both fields, we demonstrate the generation and
                      manipulation of tailored electron orbital angular momentum
                      (OAM) superposition states either by employing customized
                      holographic diffraction masks in a transmission electron
                      microscope or by atomic multiphoton ionization utilizing
                      pulse-shaper generated carrier-envelope phase stable
                      bichromatic ultrashort laser pulses. Both techniques follow
                      similar physical mechanisms based on Fourier synthesis of
                      quantum mechanical superposition states allowing the
                      preparation of a broad set of electron states with uncommon
                      symmetries. We describe both approaches in a unified picture
                      based on an advanced spatial and spectral double slit and
                      point out important analogies. In addition, we analyze the
                      topological charge and discuss the control mechanisms of the
                      free-electron OAM superposition states. Their generation and
                      manipulation by phase tailoring in transmission electron
                      microscopy and atomic multiphoton ionization is illustrated
                      on a 7-fold rotationally symmetric electron density
                      distribution.},
      cin          = {FS-CFEL-CMI},
      ddc          = {530},
      cid          = {I:(DE-H253)FS-CFEL-CMI-20220405},
      pnm          = {631 - Matter – Dynamics, Mechanisms and Control
                      (POF4-631) / DFG project 281310165 - Abbildung chemischer
                      Dynamik mittels laserinduzierter Elektronenbeugung im
                      Molekülkoordinatensystem (281310165)},
      pid          = {G:(DE-HGF)POF4-631 / G:(GEPRIS)281310165},
      experiment   = {EXP:(DE-H253)CFEL-Exp-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000581558400001},
      doi          = {10.1088/1367-2630/abbe54},
      url          = {https://bib-pubdb1.desy.de/record/454376},
}