Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mapping Nanoscale Electromagnetic Near-Field Distributions Using Optical
  Forces   We demonstrate the application of Atomic Force Microscopy (AFM) based optical
force microscopy to map the optical near-fields with nanometer resolution,
limited only by the AFM probe geometry. We map the electric field distributions
of tightly focused laser beams with different polarizations and show that the
experimentally measured data agrees well with the theoretical predictions from
a dipole-dipole interaction model, thereby validating our approach. We further
validate the proposed technique by evaluating the optical electric field
scattered by a spherical nanoparticle by measuring the optical forces between
the nanoparticle and gold coated AFM probe. The technique allows for wavelength
independent, background free, thermal noise limited mechanical imaging of
optical phenomenon with sensitivity limited by AFM performance. Optical forces
due to both electric and magnetic dipole-dipole interactions can be measured
using this technique.

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The categories of this paper are: q-fin
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
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The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
32
The categories of this paper are: atom-ph
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The categories of this paper are: comp-gas