Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 3D shaping of electron beams using amplitude masks   Shaping the electron wavefunction in three dimensions may prove to be an
indispensable tool for research involving atomic-sized particle trapping,
manipulation, and synthesis. We utilize computer-generated holograms to sculpt
electron wavefunctions in a standard transmission electron microscope in 3D,
and demonstrate the formation of electron beams exhibiting high intensity along
specific trajectories as well as shaping the beam into a 3D lattice of
hot-spots. The concepts presented here are similar to those used in light
optics for trapping and tweezing of particles, but at atomic scale resolutions.

16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga