Enhancement of light-matter interaction in MoS2 monolayers by resonant nanoparticles
Transition metal dichalcogenides (TMDs) are class of materials, which have recently attracted a high degree of scientific attention. In these materials, the adjacent crystal layers are mutually attached only by weak Van-der-Waals forces, enabling the preparation of TMD monolayers with thicknesses below one nanometer. Interestingly, TMDs, which are indirect semiconductors in their bulk form, become direct semiconductors in the monolayer limit. These monolayers show pronounced excitonic emission lines and a strong second-order nonlinearity, making TMDs very interesting for a variety of optical applications.