Journal Article

FZJ-2017-01258

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Nondestructive Measurement of Orbital Angular Momentum for an Electron Beam

Larocque, H. ; Bouchard, F. ; Grillo, V. ; Sit, A. ; Frabboni, S. ; Dunin-Borkowski, R.FZJ* ; Padgett, M. J. ; Boyd, R. W. ; Karimi, E. (Corresponding author)

2016
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/13677  doi:10.1103/PhysRevLett.117.154801

Abstract: Free electrons with a helical phase front, referred to as “twisted” electrons, possess an orbital angular momentum (OAM) and, hence, a quantized magnetic dipole moment along their propagation direction. This intrinsic magnetic moment can be used to probe material properties. Twisted electrons thus have numerous potential applications in materials science. Measuring this quantity often relies on a series of projective measurements that subsequently change the OAM carried by the electrons. In this Letter, we propose a nondestructive way of measuring an electron beam’s OAM through the interaction of this associated magnetic dipole with a conductive loop. Such an interaction results in the generation of induced currents within the loop, which are found to be directly proportional to the electron’s OAM value. Moreover, the electron experiences no OAM variations and only minimal energy losses upon the measurement, and, hence, the nondestructive nature of the proposed technique.

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Contributing Institute(s):

1. Mikrostrukturforschung (PGI-5)
2. Physik Nanoskaliger Systeme (ER-C-1)

Research Program(s):

1. 143 - Controlling Configuration-Based Phenomena (POF3-143) (POF3-143)

Appears in the scientific report 2016

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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