Highly sensitive and wide-band tunable terahertz response of plasma waves based on graphene field effect transistors.

ABSTRACT: Terahertz (THz) technology is becoming a spotlight of scientific interest due to its promising myriad applications including imaging, spectroscopy, industry control and communication. However, one of the major bottlenecks for advancing this field is due to lack of well-developed solid-state sources and detectors operating at THz gap which serves to mark the boundary between electronics and photonics. Here, we demonstrate exceptionally wide tunable terahertz plasma-wave excitation can be realized in the channel of micrometer-level graphene field effect transistors (FET). Owing to the intrinsic high propagation velocity of plasma waves (>~10(8) cm/s) and Dirac band structure, the plasma-wave graphene-FETs yield promising prospects for fast sensing, THz detection, etc. The results indicate th

SUBMITTER: Wang L 

PROVIDER: S-EPMC5381543 | biostudies-literature | 2014 Jun

REPOSITORIES: biostudies-literature