Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Beaming of WS2 Photoluminescence from a film coupled microsphere antenna   Engineering optical emission from two dimensional, transition metal
dichalcogenides (TMDs) materials such as Tungsten disulphide (WS2) has
implications in creating and understanding nanophotonic sources. One of the
challenges in controlling the optical emission from 2D materials is to achieve
narrow angular spread using a simple photonic geometry. In this paper, we study
how the photoluminescence of a monolayer WS2 can be controlled when coupled to
film coupled microsphere dielectric antenna. Specifically, by employing Fourier
plane microscopy and spectroscopic techniques, we quantify the wavevector
distribution in the momentum space. As a result, we show beaming of the WS2
photoluminescence with angular divergence of {\theta}1/2 = 4.6{\deg}.
Furthermore, the experimental measurements have been supported by
three-dimensional numerical simulations. We envisage that the discussed results
can be generalized to a variety of nanophotonic 2D materials, and can be
harnessed in nonlinear and quantum technology.

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The categories of this paper are: funct-an
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The categories of this paper are: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-th
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The categories of this paper are: quant-ph
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The categories of this paper are: eess
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: supr-con