Novel vortex generator and mode converter for electron beams.
نویسندگان
چکیده
A mode converter for electron vortex beams is described. Numerical simulations, confirmed by experiment, show that the converter transforms a vortex beam with a topological charge m=±1 into beams closely resembling Hermite-Gaussian HG(10) and HG(01) modes. The converter can be used as a mode discriminator or filter for electron vortex beams. Combining the converter with a phase plate turns a plane wave into modes with topological charge m=±1. This combination serves as a generator of electron vortex beams of high brilliance.
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ورودعنوان ژورنال:
- Physical review letters
دوره 109 8 شماره
صفحات -
تاریخ انتشار 2012