Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gradient-free temperature control over micrometric areas for
  thermoplasmonic applications in micro-and nano-devices   Control over surface temperature is of paramount importance in
optoelectronics, photocatalysis and biosensing applications, among others.
Thermoplasmonic approaches have demonstrated unrivalled performance for
controlling surface temperature, in terms of spatial resolution and thermal
amplitude. Most efforts have been done on optimizing the temperature gradient
and developing nanoscale temperature patterns. Alternatively, a temperature
gradient-free thermoplasmonic surface will enable further functionalities. For
example, a constant temperature area of a few square microns can be employed to
tune the gap of a 2D crystal or to control transition in a phase change
material without the need of local resistive heaters and external electronics.
In this work, we present a thermoplasmonic platform conceived for this purpose.
It consists of an array of gold nanoantennas on a 'silicon on insulator'
substrate, where the heat is generated by a laser beam focused on the array,
diffused over the whole silicon layer and confined in the vertical direction by
the insulator underneath. As an advantage to previous approaches, heat
diffusion allows the temperature control at a desired distance from the
excitation spot, thus showing the proposed platform as a candidate for hosting
and controlling the temperature during the characterization of light-sensitive
materials.

2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat