Nano-Optical Phenomena of 2D latered Materials

Nano-optics is a frontier of research that studies light-matter interactions in the nanometer length scale. In this talk, we present nano-optical studies of novel two-dimensional (2D) layered materials using the state-of-the-art scanning near-field optical microscopy – a unique technique allowing efficient excitation and high-resolution imaging of a variety of polaritonic modes. With this technique, we performed nano-optical imaging and spectroscopy of plasmon polaritons in graphene [1-3], graphene layers [4] and graphene nanostructures [5], phonon polaritons in hexagonal boron nitride [6], as well as exciton polaritons in transition-metal dichalcogenides [7]. Novel physics and applications associated with these polaritons will be discussed.