Experimental Demonstration of an Electrostatic Orbital Angular Momentum Sorter for Electron Beams

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 05 Mar 2021Embargo end date: 01 Jan 2019 Italy, Germany, Germany English Publisher:American Physical Society (APS)Journal:Physical Review Letters, volume 126 (issn: 0031-9007, eissn: 1079-7114,

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Authors: Amir H. Tavabi; Paolo Rosi; Enzo Rotunno; Alberto Roncaglia; Luca Belsito; Stefano Frabboni; Giulio Pozzi; +8 Authors

Experimental Demonstration of an Electrostatic Orbital Angular Momentum Sorter for Electron Beams

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Abstract

We report the first experimental demonstration of an electrostatic electron orbital angular momentum (OAM) sorter, which can be used to analyze the OAM states of electrons in a transmission electron microscope. We verify the sorter functionality for several electron beams possessing different superpositions of OAM states, and use it to record the electron beams OAM spectra. Our current electrostatic OAM sorter has an OAM resolution of 2 in the units of h/bar - the reduced Planck constant. It is expected to increase the OAM resolution of the sorter to the optimal resolution of 1 in the future via fine control of the sorting phase elements.

Countries

Italy, Germany, Germany

Related Organizations

RWTH Aachen University (Medical Faculty)
Germany
University of Ottawa
Canada
Institute for Microelectronics and Microsystems
Italy
RWTH Aachen University
Germany
National Research Council
Sri Lanka

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Keywords

---, Physics - Instrumentation and Detectors, electron microscopy, OAM, vortex electron beam, TEM, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), electron beam shaping, 530, orbital angular momentum, info:eu-repo/classification/ddc/530, Q-sort

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