The present thesis is aimed to the study of nonlinear optoelectronic phenomena induced by terahertz radiation in topological insulators and graphene. Within this work, the observation of new phenomena are presented, which provide a useful tool to study characteristic material properties. These include: cyclotron resonance of surface states in topological insulators, edge photocurrents in mono- and bi-layer graphene, resonant edge photocurrents in bi-layer graphene and a circular Hall effect in the absence of a magnetic field
