TY  - JOUR
AU  - Tavabi, Amir H.
AU  - Rosi, Paolo
AU  - Rotunno, Enzo
AU  - Roncaglia, Alberto
AU  - Belsito, Luca
AU  - Frabboni, Stefano
AU  - Pozzi, Giulio
AU  - Gazzadi, Gian Carlo
AU  - Lu, Peng-Han
AU  - Nijland, Robert
AU  - Ghosh, Moumita
AU  - Tiemeijer, Peter
AU  - Karimi, Ebrahim
AU  - Dunin-Borkowski, Rafal E.
AU  - Grillo, Vincenzo
TI  - Experimental Demonstration of an Electrostatic Orbital Angular Momentum Sorter for Electron Beams
JO  - Physical review letters
VL  - 126
IS  - 9
SN  - 0031-9007
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2022-00221
SP  - 094802
PY  - 2021
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - 33750150
UR  - <Go to ISI:>//WOS:000627618200013
DO  - DOI:10.1103/PhysRevLett.126.094802
UR  - https://juser.fz-juelich.de/record/904905
ER  -