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Publication Citation: Electron Vortex Beams with High Quanta of Orbital Angular Momentum

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Author(s): Benjamin James McMorran; Amit K. Agrawal; Ian M. Anderson; Andrew A. Herzing; Henri J. Lezec; Jabez J. McClelland; John Unguris;
Title: Electron Vortex Beams with High Quanta of Orbital Angular Momentum
Published: January 14, 2011
Abstract: Analogous to vortices in light optical beams, electron optical beams with helical wavefronts carry orbital angular momentum and promise new capabilities for electron microscopy and other applications. We use nanofabricated diffraction holograms in an electron microscope to produce multiple electron vortex beams with well-defined topological charge. Beams carrying up to 100 quanta, , of orbital angular momentum per electron are observed, demonstrating that a charged massive particle can exhibit stable quantized orbital motion in free space in the absence of any confining potential or external field. Quantized electron vortices open interesting new avenues in physics and provides novel opportunities in electron microscopy and magnetic imaging.
Citation: Science
Volume: 331
Pages: pp. 192 - 195
Keywords: electron vortex; optical vortex; Laguerre-Gaussian; electron holography
Research Areas: Focused ion beam milling (FIB), Optical Physics, Electron Physics, Quantum Physics
PDF version: PDF Document Click here to retrieve PDF version of paper (266KB)