Dr. Feng Wang discusses that graphene, a single layer of honeycomb carbon lattice, is an exciting new quantum material. Electons in graphene, for example, move as if they have zero mass and display strongly quantum mechanical behavior even at room temperature. Such massless electrons exhibit interesting optical behavior: being one atom thick, graphene can be readily observed with the naked eye. More fascinatingly, light-matter interactions in graphene can be finely controlled. In this talk, he shows that we can make graphene "transparent" and further control quantum pathways of graphene Raman scattering using electrical gating. He also discusses how we realize the first unable bandgap semiconductor out of graphene, and how quantum confinement changes the electronic structure when graphene is rolled into one-dimensional carbon nanotubes.