Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dissipation-Induced Super Scattering and Lasing PT-Spaser   Giant transmission and reflection of a finite bandwidth are shown to occur at
the same wavelength when the electromagnetic wave is incident on a periodic
array of PT-symmetric dimers embedded in a metallic film. Remarkably, we found
that this phenomenon vanishes if the metallic substrate is lossless while
keeping other parameters unchanged. When the metafilm is adjusted to the
vicinity of a spectral singularity, tuning substrate dissipation to a critical
value can lead to supper scattering in stark contrast to what would be expected
in conventional systems. The PT-synthetic plasmonic metafilm acts as a lasing
PT-spaser, a planar source of coherent radiation. The metallic dissipation
provides a mean to couple light out of the dark modes of the PT- spaser. Above
a critical gain-loss coupling, the metafilm behaves as a meta-gain medium with
the meta-gain atoms made from the PT-plasmonic dimers. This phenomenon implies
that super radiation is possible from a cavity having gain elements by tuning
the cavity dissipation to a critical value.

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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
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The categories of this paper are: math