Abstract-Asymmetric transmission of terahertz waves through a graphene-loaded metal grating

Yu Zhou¹, Ye-Qing Dong¹, Ren-Hao Fan¹, Qing Hu^1,2, Ru-Wen Peng^1,a) andMu Wang¹

1 National Laboratory of Solid State Microstructures and Department of Physics, National Center of Microstructures and Quantum Manipulation, Nanjing University, Nanjing 210093, China
2 Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
a) Author to whom correspondence should be addressed. Electronic mail: rwpeng@nju.edu.cn
Appl. Phys. Lett. 105, 041114 (2014); http://dx.doi.org/10.1063/1.4891818

http://scitation.aip.org/content/aip/journal/apl/105/4/10.1063/1.4891818

In this work, we theoretically investigate the propagation of terahertz (THz) waves through a graphene-loaded metal grating under external magnetic field. It is found that resonant modes in the system can be converted between transverse-electric and transverse-magneticpolarizations due to Hall conductivity of graphene. As a consequence, asymmetric transmission of THz waves through this graphene-loaded metal grating is achieved. Furthermore, by adjusting either the external magnetic field or the Fermi level of graphene, such asymmetricwave propagation can be significantly tuned. The investigations may provide a unique way to achieve the graphene-loaded optodevices for THz waves.