Engineering the electromagnetic environment of light emitters has been achieved using photonic cavities and plamonic nanostructures, which leads to enhanced spontaneous emission or strong light-matter interaction through cavity quantum electrodynamics. Two dimensional van der Waal materials have emerged as a new class of materials for nanophotonic applications. Among these emergent materials, transition metal dichalcogenides (TMDs) are especially promising due to its strong excitonic effect. Furthermore, TMDs possess intrinsic valley pseudospin, which can be encoded as information carriers for electronic applications. In our lab, we prepare photonic and plasmonic nanostructures through conventional semiconductor fabrication techniques and combined with CVD grown TMDs to study the light-matter interactions in such novel material systems. Exciton-polariton were observed in coupled Tamm plamonic structures and TMDs. Properties of such quasi-particles were studied via PL emission and absorption spectrum. We also utilize spin-orbit coupling of light in plasmonic nanostructures to exploit the valley polarization of monolayer WS2. These demonstrations mark a step towards two-dimensional optoelectronic applications.
