Open AccessDispersion HIE‐FDTD method for simulating graphene‐based absorber
Author(s) -
Xu Ning,
Chen Juan,
Wang Jianguo,
Qin Xijia,
Shi Jiepei
Publication year - 2017
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2015.0707
Subject(s) - finite difference time domain method , graphene , dispersion (optics) , materials science , dispersion relation , terahertz radiation , optics , physics , optoelectronics , nanotechnology
A dispersion hybrid implicit–explicit finite‐difference time‐domain (HIE‐FDTD) method is proposed for simulating the graphene‐based absorber at terahertz frequencies. The surface conductivity of the graphene derived from the Kubo formula is incorporated into the conventional HIE‐FDTD algorithm by using the auxiliary differential equation technique. The time step size of this method is not related with the fine cells inside the graphene layer. The simulation result of the infinite graphene sheet shows that the dispersion HIE‐FDTD method has high computational accuracy and the computational time is greatly reduced compared with the dispersion FDTD method. By using the dispersion HIE‐FDTD method, it is validated that the graphene sheet can be used as a broadband absorber.