Analyzing tunable terahertz grating based on hybrid graphene-metal structure by using the HIE-FDTD method

作者：Chen, Juan; Hao, Guocheng^*; Liu, Qing Huo

来源：International Journal of Numerical Modelling: Electronic Networks, Devices and Fields , 2018, 31(5): e2325.

DOI：10.1002/jnm.2325

• graphene
• grating
• hybrid implicit-explicit finite-difference time domain method
• terahertz

A hybrid graphene-metal grating is simulated and analyzed at terahertz frequency band by using the hybrid implicit-explicit finite-difference time domain (HIE-FDTD) method. To simulate the graphene layer accurately, both the interband and intraband conductivity of the graphene are incorporated into the HIE-FDTD method by using the auxiliary differential equations and Pade fitting technique. Numerical results show that the HIE-FDTD method has excellent computational accuracy and its computational efficiency is considerably improved from that of the conventional FDTD method. Besides, numerical results validate that the graphene can achieve tunable terahertz grating through controlling its chemical potential, and the interband conductivity of the graphene has important effects on the performance of the grating.

• 出版日期2018-10
• 单位西安交通大学; 中国地质大学（北京）