This title appears in the Scientific Report :
2020
Please use the identifier:
http://dx.doi.org/10.1016/j.ultramic.2019.112861 in citations.
Please use the identifier: http://hdl.handle.net/2128/25745 in citations.
Design of electrostatic phase elements for sorting the orbital angular momentum of electrons
Design of electrostatic phase elements for sorting the orbital angular momentum of electrons
The orbital angular momentum (OAM) sorter is a new electron optical device for measuring an electron’s OAM. It is based on two phase elements, which are referred to as the “unwrapper” and “corrector” and are placed in Fourier-conjugate planes in an electron microscope. The most convenient implementa...
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Personal Name(s): | Pozzi, Giulio |
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Grillo, Vincenzo (Corresponding author) / Lu, Peng-Han / Tavabi, Amir H. / Karimi, Ebrahim / Dunin-Borkowski, Rafal E. | |
Contributing Institute: |
Physik Nanoskaliger Systeme; ER-C-1 |
Published in: | Ultramicroscopy, 208 (2020) S. 112861 - |
Imprint: |
Amsterdam
Elsevier Science
2020
|
DOI: |
10.1016/j.ultramic.2019.112861 |
PubMed ID: |
31670053 |
Document Type: |
Journal Article |
Research Program: |
Enabling Science and Technology through European Electron Microscopy QUANTUM SORTER Controlling Configuration-Based Phenomena |
Link: |
Restricted Published on 2019-10-16. Available in OpenAccess from 2021-10-16. Restricted Published on 2019-10-16. Available in OpenAccess from 2021-10-16. |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/25745 in citations.
The orbital angular momentum (OAM) sorter is a new electron optical device for measuring an electron’s OAM. It is based on two phase elements, which are referred to as the “unwrapper” and “corrector” and are placed in Fourier-conjugate planes in an electron microscope. The most convenient implementation of this concept is based on the use of electrostatic phase elements, such as a charged needle as the unwrapper and a set of electrodes with alternating charges as the corrector. Here, we use simulations to assess the role of imperfections in such a device, in comparison to an ideal sorter. We show that the finite length of the needle and the boundary conditions introduce astigmatism, which leads to detrimental cross-talk in the OAM spectrum. We demonstrate that an improved setup comprising three charged needles can be used to compensate for this aberration, allowing measurements with a level of cross-talk in the OAM spectrum that is comparable to the ideal case. |