Abstract
AbstractTerahertz field induced photocurrents in graphene were studied experimentally and by microscopic modeling. Currents were generated by and pulsed laser radiation in large area as well as small‐size exfoliated graphene samples. We review general symmetry considerations leading to photocurrents depending on linear and circular polarized radiation and then present a number of situations where photocurrents were detected. Starting with the photon drag effect under oblique incidence, we proceed to the photogalvanic effect enhancement in the reststrahlen band of SiC and edge‐generated currents in graphene. Ratchet effects were considered for in‐plane magnetic fields and a structure inversion asymmetry as well as for graphene with non‐symmetric patterned top gates. Lastly, we demonstrate that graphene can be used as a fast, broadband detector of terahertz radiation.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
