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@ARTICLE{Grillo:837859,
      author       = {Grillo, Vincenzo and Tavabi, Amir H. and Venturi, Federico
                      and Larocque, Hugo and Balboni, Roberto and Gazzadi, Gian
                      Carlo and Frabboni, Stefano and Lu, Peng-Han and Mafakheri,
                      Erfan and Bouchard, Frédéric and Dunin-Borkowski, Rafal
                      and Boyd, Robert W. and Lavery, Martin P. J. and Padgett,
                      Miles J. and Karimi, Ebrahim},
      title        = {{M}easuring the orbital angular momentum spectrum of an
                      electron beam},
      journal      = {Nature Communications},
      volume       = {8},
      issn         = {2041-1723},
      address      = {London},
      publisher    = {Nature Publishing Group},
      reportid     = {FZJ-2017-06636},
      pages        = {15536 -},
      year         = {2017},
      abstract     = {Electron waves that carry orbital angular momentum (OAM)
                      are characterized by a quantized and unbounded magnetic
                      dipole moment parallel to their propagation direction. When
                      interacting with magnetic materials, the wavefunctions of
                      such electrons are inherently modified. Such variations
                      therefore motivate the need to analyse electron
                      wavefunctions, especially their wavefronts, to obtain
                      information regarding the material’s structure. Here, we
                      propose, design and demonstrate the performance of a device
                      based on nanoscale holograms for measuring an electron’s
                      OAM components by spatially separating them. We sort pure
                      and superposed OAM states of electrons with OAM values of
                      between −10 and 10. We employ the device to analyse the
                      OAM spectrum of electrons that have been affected by a
                      micron-scale magnetic dipole, thus establishing that our
                      sorter can be an instrument for nanoscale magnetic
                      spectroscopy},
      cin          = {ER-C-1 / PGI-5},
      ddc          = {500},
      cid          = {I:(DE-Juel1)ER-C-1-20170209 / I:(DE-Juel1)PGI-5-20110106},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000401961300001},
      pubmed       = {pmid:28537248},
      doi          = {10.1038/ncomms15536},
      url          = {https://juser.fz-juelich.de/record/837859},
}