Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Limitations of Particle-Based Spasers   We present a semi-classical analytic model for spherical core-shell surface
plasmon lasers. Within this model, we drop the widely used one-mode
approximations in favor of fully electromagnetic Mie theory. This allows for
incorporation of realistic gain relaxation rates that so far have been
massively underestimated. Especially, higher order modes can undermine and even
reverse the beneficial effects of the strong Purcell effect in such systems.
Our model gives a clear view on gain- and resonator-requirements, as well as on
the output characteristics that will help experimenters to design more
efficient particle-based spasers.

15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
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The categories of this paper are: stat
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
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The categories of this paper are: quant-ph