Erfan Mafakheri

TL;DR: In this article, an improved type of holographic-plate suitable for the shaping of electron beams is proposed, which is fabricated by a focused ion beam on a silicon nitride membrane and introduces a controllable phase shift to the electron wavefunction.

TL;DR: Similar to orbital angular momentum-carrying optical beams, it is now possible to engineer structured electron beams that could find applications in imaging, nanofabrication and the study of fundamental phenomena.

TL;DR: This work proposes, design and demonstrates the performance of a device based on nanoscale holograms for measuring an electron's OAM components by spatially separating them and employs the device to analyse the OAM spectrum of electrons that have been affected by a micron-scale magnetic dipole, establishing that the sorter can be an instrument for nanoscales magnetic spectroscopy.

TL;DR: In this article, the authors show how the limitations of the current fabrication of such holograms can be overcome by using electron beam lithography and demonstrate experimentally the realization of an electron vortex beam with the largest OAM value that has yet been reported to the first diffraction order.

TL;DR: This work proposes and manufactures a nanofabricated phase hologram for generating a beam of this kind with an orbital angular momentum up to 200ℏ and, apart from the technological achievements, may lead to a way of generating electron beams with a high quanta of magnetic moment along the propagation direction.