This paper reviews the first demonstrations of broadband graphene terahertz modulators as well as recent progress on
reconfigurable terahertz devices using graphene. Although atom-thick, single layer graphene is capable of efficiently
tuning terahertz absorption meanwhile introducing negligible insertion loss. Recent developments in terms of
transmission-mode and reflection-mode electro-absorption modulators are reviewed. Moreover, an application of these
devices is presented and discussed: arrays of graphene electro-absorption modulators as electrically reconfigurable
patterns for terahertz cameras.