Thursday, July 31, 2014

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

Yu Zhou1Ye-Qing Dong1Ren-Hao Fan1Qing Hu1,2Ru-Wen Peng1,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:
    Appl. Phys. Lett. 105, 041114 (2014)

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.

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