کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1677693 1518363 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sub-nanometer free electrons with topological charge
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Sub-nanometer free electrons with topological charge
چکیده انگلیسی

The holographic mask technique is used to create freely moving electrons with quantized angular momentum. With electron optical elements they can be focused to vortices with diameters below the nanometer range. The understanding of these vortex beams is important for many applications. Here, we produce electron vortex beams and compare them to a theory of electrons with topological charge. The experimental results show excellent agreement with simulations. As an immediate application, fundamental experimental parameters like spherical aberration and partial coherence are determined.


► Creation and propagation of sub-nanometer electron vortices.
► Modelling of partial coherence, spherical abberation, and defocus.
► Excellent agreement between experiments and simulations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultramicroscopy - Volume 115, April 2012, Pages 21–25
نویسندگان
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