Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhanced and directional single photon emission in hyperbolic
  metamaterials   We propose an approach to enhance and direct the spontaneous emission from
isolated emitters embedded inside hyperbolic metamaterials into single photon
beams. The approach rests on collective plasmonic Bloch modes of hyperbolic
metamaterials which propagate in highly directional beams called quantum
resonance cones. We propose a pumping scheme using the transparency window of
the hyperbolic metamaterial that occurs near the topological transition.
Finally, we address the challenge of outcoupling these broadband resonance
cones into vacuum using a dielectric bullseye grating. We give a detailed
analysis of quenching and design the metamaterial to have a huge Purcell factor
in a broad bandwidth inspite of the losses in the metal. Our work should help
motivate experiments in the development of single photon sources for broadband
emitters such as nitrogen vacancy centers in diamond.

10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin