Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lateral forces on nanoparticles near a surface under
  circularly-polarized plane-wave illumination   Optical forces allow manipulation of small particles and control of
nanophotonic structures with light beams. Here, we describe a counter-intuitive
lateral optical force acting on particles placed above a substrate, under
uniform plane wave illumination without any field gradients. We show that under
circularly-polarized illumination, nanoparticles experience a lateral force as
a result of dipolar, spin-sensitive scattering, with a magnitude comparable to
other optical forces. To this end, we rigorously calculate the force
experienced by a circularly polarized dipole radiating above a surface. Unlike
for linearly-polarized dipoles, force components parallel to the surface can
exist, caused by the recoil of unidirectional guided modes excited at the
surface and/or by dipole-dipole interactions with the induced image dipole.
These results were presented and discussed in conferences [1] and [2].

10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ