Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1533911 | Optics Communications | 2015 | 5 Pages |
Abstract
We have proposed an electrically controllable terahertz (THz) beam scanning device based on asymmetric graphene plasmonic grating. It is proved that the dispersion relation of surface plasmon waves can be efficiently manipulated on the periodic metal-dielectric-graphene plasmonic structure by an external bias voltage, and thus the derivation angle of the THz beam can be actively tuned. The numerical results show that the radiation angle of THz waves through this device can be tuned from â18° to 18° with the bias changing from 53.5 mV into 368.8 mV at the operating frequency of 0.5 THz. This electrically active beam scanning device has important application in the THz imaging, radar and communication systems.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Meng Chen, Fei Fan, Pengfei Wu, Hui Zhang, Shengjiang Chang,