Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spaser Action, Loss Compensation, and Stability in Plasmonic Systems
  with Gain   We demonstrate that the conditions of spaser generation and the full loss
compensation in a resonant plasmonic-gain medium (metamaterial) are identical.
Consequently, attempting the full compensation or overcompensation of losses by
gain will lead to instability and a transition to a spaser state. This will
limit (clamp) the inversion and lead to the limitation on the maximum loss
compensation achievable. The criterion of the loss overcompensation, leading to
the instability and spasing, is given in a analytical and universal
(independent from system's geometry) form.

23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys