Introduction to the Issue on 2-D Materials Optoelectronics

The papers in this special issue focus on the topic of two-dimensional materials optoelectronics. Graphene, a single layer of carbon atoms assembled in a honey-comb lattice, attracts significant attention from photonics community, due to its strong interaction with light and potential applications in a broad wavelength range. Other than metallic graphene, transition metal dichalcogenides (TMDCs) and insulating hexagonal boron nitride (hBN) also exhibit very interesting optical properties and are widely explored. Recently the rediscovered 2-D layered black phosphorus with a widely tunable bandgap by the layer number joins the 2-D materials family, leading to new opportunities in optoelectronics. Collectively 2-D materials with very different properties and their heterostructures offer numerous opportunities for the discoveries of new optical sciences and the realization of novel optical devices. The purpose of this issue of JSTQE is to highlight the recent progress and trends in the research of 2-D optical materials and devices.