Designing graphene absorber in Terahertz band using HIE-FDTD method

HAN Xiaobing; ZHANG Hui; LIANG Bingyang; ZHOU Yuanguo

doi:10.12265/j.cjors.2020276

Volume 37 Issue 1

Feb. 2022

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CHINESE JOURNAL OF RADIO SCIENCE > 2022 > 37(1): 106-112. > DOI: 10.12265/j.cjors.2020276

HAN X B, ZHANG H, LIANG B Y, et al. Designing graphene absorber in Terahertz band using HIE-FDTD method[J]. Chinese journal of radio science，2022，37（1）：106-112 + 136. （in Chinese）. DOI: 10.12265/j.cjors.2020276

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Designing graphene absorber in Terahertz band using HIE-FDTD method

College of Communication and Information Engineering, Xi’an University of Science and Technology, Xi’an 710054, Chian

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Received Date: December 25, 2020
Available Online: May 16, 2021

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Abstract

The hybrid implicit-explicit FDTD (HIE-FDTD) method is used to numerically simulate the graphene absorber. The intraband conductivity of graphene is introduced into the HIE-FDTD method through the auxiliary difference equation (ADE) and the conformal technology is used to complete the characteristic analysis of the designed new graphene absorber. Numerical results show that the absorption rate of the absorber can reach 99.8% near 2.68 THz, and the working frequency of the absorber can be adjusted by controlling the chemical potential of graphene and the width of the ring in the terahertz frequency band. The ring-shaped absorber designed in this paper has a simple structure and has potential applications in terahertz devices such as detectors, sensors, and filters.

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