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Engineering optical emission from two dimensional, transition metaldichalcogenides (TMDs) materials such as Tungsten disulphide (WS2) hasimplications in creating and understanding nanophotonic sources. One of thechallenges in controlling the optical emission from 2D materials is to achievenarrow angular spread using a simple photonic geometry. In this paper, we studyhow the photoluminescence of a monolayer WS2 can be controlled when coupled tofilm coupled microsphere dielectric antenna. Specifically, by employing Fourierplane microscopy and spectroscopic techniques, we quantify the wavevectordistribution in the momentum space. As a result, we show beaming of the WS2photoluminescence with angular divergence of {\theta}1/2 = 4.6{\deg}.Furthermore, the experimental measurements have been supported bythree-dimensional numerical simulations. We envisage that the discussed resultscan be generalized to a variety of nanophotonic 2D materials, and can beharnessed in nonlinear and quantum technology.

Mirror-Coupled Microsphere can narrow the Angular distribution of Photoluminescence from WS2 Monolayers