Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Controlling polarization of attosecond pulses with plasmonic-enhanced
  bichromatic counter-rotating circularly polarised fields   The use of bichromatic counter-rotating laser field is known to generate
high-order harmonics with non-zero ellipticity. By combining such laser field
with a plasmonic-enhanced spatially inhomogeneous field, we propose a way to
influence the sub-cycle dynamics of the high-harmonic generation process. Using
the numerical solution of the time-dependent Schr{\"o}dinger equation combined
with classical trajectory Monte Carlo simulations, we show that the change of
the direction and the strength of the plasmonic field selectively enhances or
suppresses certain recombining electron trajectories. This in turn modifies the
ellipticity of the emitted attosecond pulses.

11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con