Journal Article

FZJ-2022-00221

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Experimental Demonstration of an Electrostatic Orbital Angular Momentum Sorter for Electron Beams

Tavabi, A. H.FZJ* ; Rosi, P. ; Rotunno, E. (Corresponding author) ; Roncaglia, A. ; Belsito, L. ; Frabboni, S. ; Pozzi, G. ; Gazzadi, G. C. ; Lu, P.-H.FZJ* ; Nijland, R.FZJ* ; Ghosh, M. ; Tiemeijer, P. ; Karimi, E. ; Dunin-Borkowski, R. E.FZJ* ; Grillo, V. (Corresponding author)

2021
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/29971  doi:10.1103/PhysRevLett.126.094802

Abstract: The component of orbital angular momentum (OAM) in the propagation direction is one of the fundamental quantities of an electron wave function that describes its rotational symmetry and spatial chirality. Here, we demonstrate experimentally an electrostatic sorter that can be used to analyze the OAM states of electron beams in a transmission electron microscope. The device achieves postselection or sorting of OAM states after electron-material interactions, thereby allowing the study of new material properties such as the magnetic states of atoms. The required electron-optical configuration is achieved by using microelectromechanical systems technology and focused ion beam milling to control the electron phase electrostatically with a lateral resolution of 50 nm. An OAM resolution of 1.5ℏ is realized in tests on controlled electron vortex beams, with the perspective of reaching an optimal OAM resolution of 1ℏ in the near future.

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Contributing Institute(s):

1. Physik Nanoskaliger Systeme (ER-C-1)

Research Program(s):

1. 5351 - Platform for Correlative, In Situ and Operando Characterization (POF4-535) (POF4-535)
2. Q-SORT - QUANTUM SORTER (766970) (766970)
3. ESTEEM3 - Enabling Science and Technology through European Electron Microscopy (823717) (823717)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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