Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Super-resolution Orthogonal Deterministic Imaging Technique for
  Terahertz Subwavelength Microscopy   Terahertz subwavelength imaging aims at developing THz microscopes able to
resolve deeply subwavelength features. To improve the spatial resolution beyond
the diffraction limit, a current trend is to use various subwavelength probes
to convert the near-field to the far-field. These techniques, while offering
significant gains in spatial resolution, inherently lack the ability to rapidly
obtain THz images due to the necessity of slow pixel-by-pixel raster scan and
often suffer from low light throughput. In parallel, in the visible spectral
range, several super-resolution imaging techniques were developed that enhance
the image resolution by recording and statistically correlating multiple images
of an object backlit with light from stochastically blinking fluorophores.
Inspired by this methodology, we develop a Super-resolution Orthogonal
Deterministic Imaging (SODI) technique and apply it in the THz range. Since
there are no natural THz fluorophores, we use optimally designed mask sets
brought in proximity with the object as artificial fluorophores. Because we
directly control the form of the masks, rather than relying on statistical
averages, we aim at employing the smallest possible number of frames. After
developing the theoretical basis of SODI, we demonstrate the second-order
resolution improvement experimentally using phase masks and binary amplitude
masks with only 8 frames. We then numerically show how to extend the SODI
technique to higher orders to further improve the resolution. As our
formulation is based on the equation of linear imaging and it uses spatial
modulation of either the phase or the amplitude of the THz wave, our
methodology can be readily adapted for the use with existing phase-sensitive
single pixel imaging systems or any amplitude sensitive THz imaging arrays.

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The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
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The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci