Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-resonant subwavelength imaging by dielectric microparticles   Recently a hypothesis explaining the non-resonant mechanism of subwavelength
imaging granted by a dielectric microsphere has been suggested. In accordance
to the hypothesis, the far-field image of a subwavelength scatterer strongly
coupled to a microsphere by near fields is offered by the scatterer
polarization normal to the sphere surface. The radiation of a closely located
normally oriented dipole is shaped by the microsphere so that the transmitted
wave beam has a practically flat phase front. Then this beam turns out to be
imaging -- keeping the subwavelength information about the dipole location.
However, this mechanism of subwavelength imaging was only supposed in our
previous paper. In this paper, we present a theoretical study which confirms
this hypothesis and better explains the underlying physics. In several
scenarios of the imaging beam evolution either a flat or a slightly diverging
phase front of the hollow wave beam formed by a microsphere enables the deeply
subwavelength ($0.1-0.2\lambda$) resolution of two dipole sources. We
numerically simulate one of these scenarios -- that one in which the focusing
lens is located closer than the Rayleigh diffraction length to the beam-forming
microsphere and represents a microsphere itself. In our simulations we replace
a 3D microsphere by a 2D "sphere" (microcylinder) so that to use an available
electromagnetic solver for dielectric microparticles of very large optical
sizes. The physical mechanism of the imaging does not suffer of this
replacement.

36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con