All-optical control of ultrafast photocurrents in unbiased graphene.

ABSTRACT: Graphene has recently become a unique playground for studying light-matter interaction effects in low-dimensional electronic systems. Being of strong fundamental importance, these effects also open a wide range of opportunities in photonics and optoelectronics. In particular, strong and broadband light absorption in graphene allows one to achieve high carrier densities essential for observation of nonlinear optical phenomena. Here, we make use of strong photon-drag effect to generate and optically manipulate ultrafast photocurrents in graphene at room temperature. In contrast to the recent reports on injection of photocurrents in graphene due to external or built-in electric field effects and by quantum interference, we force the massless charge carriers to move via direct transfer of line

SUBMITTER: Obraztsov PA 

PROVIDER: S-EPMC3915314 | biostudies-literature | 2014 Feb

REPOSITORIES: biostudies-literature