Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Design, Fabrication and Characterization of nanoplasmonic lattice for
  trapping of ultracold atoms   Ultracold atom-traps on a chip enhances the practical application of atom
traps in quantum information processing, sensing, and metrology. Plasmon
mediated near-field optical potentials are promising for trapping atoms. The
combination of plasmonic nanostructures and ultracold atoms has the potential
to create a two dimensional array of neutral atoms with lattice spacing smaller
than that of lattices created from interfering light fields -- the optical
lattices. We report the design, fabrication and characterization of a
nano-scale array of near-field optical traps for neutral atoms using plasmonic
nanostructures. The building block of the array is a metallic nano-disc
fabricated on the surface of an ITO-coated glass substrate. We numerically
simulate the electromagnetic field-distribution using Finite Difference Time
Domain method around the nanodisc, and calculate the intensity, optical
potential and the dipole force for $^{87}$Rb atoms. The optical near-field
generated from the fabricated nanostructures is experimentally characterized by
using Near-field Scanning Optical Microscopy. We find that the optical
potential and dipole force has all the desired characteristics to trap cold
atoms when a blue-detuned light-field is used to excite the nanostructures.
This trap can be used for effective trapping and manipulation of isolated atoms
and also for creating a lattice of neutral atoms having sub-optical wavelength
lattice spacing. Near-field measurements are affected by the influence of tip
on the sub-wavelength structure. We present a deconvolution method to extract
the actual near-field profile from the measured data.

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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-bio
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The categories of this paper are: math
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The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
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The categories of this paper are: stat
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The categories of this paper are: econ
0
The categories of this paper are: hep-ph
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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
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The categories of this paper are: mtrl-th