Efficient Sorting of Free Electron Orbital Angular Momentum
arXiv:1609.09124 · doi:10.1088/1367-2630/aa5f6f
Abstract
We propose a method for sorting electrons by orbital angular momentum (OAM). Several methods now exist to prepare electron wavefunctions in OAM states, but no technique has been developed for efficient, parallel measurement of pure and mixed electron OAM states. The proposed technique draws inspiration from the recent demonstration of the sorting of OAM through modal transformation. We show that the same transformation can be performed with electrostatic electron optical elements. Specifically, we show that a charged needle and an array of electrodes perform the transformation and phase correction necessary to sort orbital angular momentum states. This device may enable the analysis of the spatial mode distribution of inelastically scattered electrons.
10 pages, 7 figures
References in corpus (7)
- High-dimensional quantum cryptography with twisted light
- Direct Measurement of a 27-Dimensional Orbital-Angular-Momentum State Vector
- Magnetic monopole field exposed by electrons
- Quantised orbital angular momentum transfer and magnetic dichroism in the interaction of electron vortices with matter
- Sculpturing the Electron Wave Function
- A novel vortex generator and mode converter for electrons
- Mapping spin-polarised transitions with atomic resolution
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- Exploring the spatial features of electronic transitions in molecular and biomolecular systems by swift electrons