Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phase space manipulation of free-electron pulses from metal nanotips
  using combined THz near-fields and external biasing   We present a comprehensive experimental and numerical study of photoelectron
streaking at metallic nanotips using single-cycle Terahertz (THz) transients
and a static bias voltage as an external control parameter. Analyzing bias
voltage dependent streaking spectrograms, we explore the THz-induced reshaping
of photoelectron energy spectra, governed by the superimposed static field.
Numerical simulations are employed to determine the local field strengths and
spatial decay lengths of the field contributions, demonstrating electron
trajectory control and the manipulation of the phase space distributions in
confined fields with both dynamic and static components.

8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org