Single photon emitters in exfoliated WSe2 structures.

@article{Koperski2015SinglePE,
  title={Single photon emitters in exfoliated WSe2 structures.},
  author={Maciej Koperski and Karol Nogajewski and Ashish Arora and Vladimir Cherkez and Pierre Mallet and Jean Yves Veuillen and J. Scott Marcus and Piotr Kossacki and Marek Potemski},
  journal={Nature nanotechnology},
  year={2015},
  volume={10 6},
  pages={
          503-6
        }
}
Crystal structure imperfections in solids often act as efficient carrier trapping centres, which, when suitably isolated, act as sources of single photon emission. The best known examples of such attractive imperfections are well-width or composition fluctuations in semiconductor heterostructures (resulting in the formation of quantum dots) and coloured centres in wide-bandgap materials such as diamond. In the recently investigated thin films of layered compounds, the crystal imperfections may… 
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