Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ultrasensitive all-optical thermometry using nanodiamonds with high
  concentration of silicon-vacancy centres and multiparametric data analysis   Nanoscale thermometry is paramount to study primary processes of heat
transfer in solids and is a subject of hot debate in cell biology. Here we
report ultrafast temperature sensing using all-optical thermometry exploiting
synthetic nanodiamonds with silicon-vacancy (SiV) centres embedded at a high
concentration. Using multi-parametric analysis of photoluminescence (PL) of
these centres, we have achieved an intrinsic noise floor of about 10 mK
Hz$^{-1/2}$, which is a thousand-fold increase in the readout speed in
comparison to the current record values demonstrated with all-optical methods
of comparable spatial-resolution and precision. Our thermometers are smaller
than 250-nm across but can detect a 0.4$^\circ$C change of temperature in a
measurement taking only 0.001 second. The exceptional sensitivity and
simplicity of these thermometers enable a wide range of applications such as
temperature monitoring and mapping within intracellular regions and in
state-of-the-art solid-state electronic nanodevices.

4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol