Abstract

The theory of negative refraction proposed by Veselago in 1968 is the foundation of making a “perfect” optical lens with negative refraction medium to focus the light into a fine point. Recently, it was suggested that an electron equivalent of the negative refraction can be realized in a mono-layered graphene to fabricate the electric lens in graphene. The long electron mean free path, ballistic electronic transport, and high current density of graphene make graphene a good candidate for new devices based on the electric lens effect. In this chapter, we review the principles of this amazing physical phenomenon, as well as the potential applications based on it.