Dipolar Coupling at Interfaces of Ultrathin Semiconductors, Semimetals, Plasmonic Nanoparticles, and Molecules

Recent progress in growth techniques has enabled the fabrication of stacks of transition metal dichalcogenide monolayers combined with different nanostructures ranging from other 2D layers over dye molecules to even plasmonic nanoparticles. Such structures promise to combine the optoelectric properties of the constituents allowing to design structures with desired properties. For all of these examples, a detailed knowledge of the coupling among different constituents is crucial. In this article, a unified description is presented based on Maxwell Bloch equations to describe dipolar interactions among different types of heterostructures. Exemplary, Forster-type energy transfer from dye molecules to MoS2 monolayers, strong coupling at MoSe2-metal nanoparticle interfaces, Meitner-Auger-like interlayer coupling in WSe2-graphene stacks, and relaxation processes of hot interlayer excitons in MoSe2-WSe2 heterobilayers are discussed.