Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ultrafast Radiative Heat Transfer   Light absorption in conducting materials produces heating of their conduction
electrons, followed by relaxation into phonons within picoseconds, and
subsequent diffusion into the surrounding media over longer timescales. This
conventional picture of optical heating is supplemented by radiative cooling,
which typically takes place at an even lower pace, only becoming relevant for
structures held in vacuum or under extreme conditions of thermal isolation.
Here we reveal an ultrafast radiative cooling regime between neighboring
plasmon-supporting graphene nanostructures in which noncontact heat transfer
becomes a dominant channel. We predict that >50% of the electronic heat energy
deposited on a graphene disk can be transferred to a neighboring nanoisland
within a femtosecond timescale. This phenomenon is facilitated by the
combination of low electronic heat capacity and large plasmonic field
concentration displayed by doped graphene. Similar effects should take place in
other van der Waals materials, thus opening an unexplored avenue toward
efficient heat management in ultrathin nanostructures.

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The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg