Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Common-Path Interferometer for Time-Resolved and Shot-Noise-Limited
  Detection of Single Nanoparticles   We give a detailed description of a novel method for time-resolved
experiments on single non-luminescent nanoparticles. The method is based on the
combination of pump-probe spectroscopy and a common-path interferometer. In our
interferometer, probe and reference arms are separated in time and polarization
by a birefringent crystal. The interferometer, fully described by an analytical
model, allows us to separately detect the real and imaginary contributions to
the signal. We demonstrate the possibilities of the setup by time-resolved
detection of single gold nanoparticles as small as 10 nm in diameter, and of
acoustic oscillations of particles larger than 40 nm in diameter.

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The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
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The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: supr-con
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
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The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci