Heidelberg 2015 – wissenschaftliches Programm
A 37.4: Poster
Donnerstag, 26. März 2015, 17:00–19:00, C/Foyer
Relativistic electron beams carrying orbital angular momentum — •Teuntje Tijssen and Mark Dennis — H. H. Wills Physics Laboratory, Bristol, United Kingdom
A simple analytic form of a relativistic electron beam carrying orbital angular momentum is the so-called Bessel beam solution of the Dirac equation, whose components are eigenfunctions of the angular momentum operator around the beam axis with different integer azimuthal labels. Close to the axis of the beam, the different angular momentum labels of different components give rise to an angular interference effect, somewhat similar to the quantum cores studied for optical vortices. our analytic investigation includes careful regularisation of the relativistic electron Bessel beams to have finite energy and self-consistency with the induced electromagnetic field along the core.