Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-Power Near-Concentric Fabry-Perot Cavity for Phase Contrast
  Electron Microscopy   Transmission electron microscopy (TEM) of vitrified biological macromolecules
(cryo-EM) is limited by the weak phase contrast signal that is available from
such samples. Using a phase plate would thus substantially improve the
signal-to-noise ratio. We have previously demonstrated the use of a high-power
Fabry-Perot cavity as a phase plate for TEM. We now report improvements to our
laser cavity that allow us to achieve record continuous-wave intensities of
over 450 GW/cm$^{2}$, sufficient to produce the optimal 90{\deg} phase shift
for 300 keV electrons. In addition, we have performed the first cryo-EM
reconstruction using a laser phase plate, demonstrating that the stability of
this laser phase plate is sufficient for use during standard cryo-EM data
collection.

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The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph