Open AccessUltra-broadband microwave metamaterial absorber with tetramethylurea inclusion
Author(s) -
Jiaqi Zhang,
Xiaoyu Wu,
Liyuan Liu,
Cheng Huang,
Xieyu Chen,
Zhen Tian,
Chunmei Ouyang,
Jianqiang Gu,
Xueqian Zhang,
Ming He,
Jiaguang Han,
Xiangang Luo,
Weili Zhang
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.025595
Subject(s) - tetramethylurea , materials science , microwave , absorption (acoustics) , broadband , optics , dielectric , metamaterial , metamaterial absorber , spectroscopy , debye , optoelectronics , physics , tunable metamaterials , chemistry , condensed matter physics , organic chemistry , quantum mechanics , solvent
The absorption region of a water-based absorber was expanded by introducing tetramethylurea (TMU) into the inclusion, whose dielectric properties are tunable through the concentration of TMU. The dielectric spectroscopy of a TMU/water mixture was deconstructed using a Debye model. We designed a four-layer ultra-broadband microwave absorber with a supernatant micro-structure. Simulation and experiment results indicate that the absorber can achieve 90% perfect absorption, covering a broad frequency range of 4-40 GHz. The concentration dependence of the absorber was also studied experimentally and numerically. The concentration control provides a more practical and large frequency-region modulation of perfect absorption.