Feasibility of an Electron Orbital Angular Momentum Sorter

Non-destructive measurement of an electron beam’s orbital angular momentum

Hugo Larocque,1 Frédéric Bouchard,1 Vincenzo Grillo,2 Alicia Sit,1 Stefano Frabboni,2, 3 Rafal E. Dunin-Borkowski,4 Miles J. Padgett,5 Robert W. Boyd,1, 6 and Ebrahim Karimi1, 7, ∗ 1The Max Planck Centre for Extreme and Quantum Photonics, Department of Physics, University of Ottawa, 25 Templeton St., Ottawa, Ontario, K1N 6N5 Canada 2CNR-Istituto Nanoscienze, Centro S3, Via G Campi 213/a, I-4112...

Nondestructive Measurement of Orbital Angular Momentum for an Electron Beam.

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...

Measuring the orbital angular momentum spectrum of an electron beam

Electron waves that carry orbital angular momentum (OAM) are characterized by a quantized and unbounded magnetic dipole moment parallel to their propagation direction. When interacting with magnetic materials, the wavefunctions of such electrons are inherently modified. Such variations therefore motivate the need to analyse electron wavefunctions, especially their wavefronts, to obtain informat...

Development of an Orbital Angular Momentum Sorter for High-Speed Data Transfer

Optical orbital angular momentum.

We present a brief introduction to the orbital angular momentum of light, the subject of our theme issue and, in particular, to the developments in the 13 years following the founding paper by Allen et al. (Allen et al. 1992 Phys. Rev. A 45, 8185 (doi:10.1103/PhysRevA.45.8185)). The papers by our invited authors serve to bring the field up to date and suggest where developments may take us next...