Open AccessMultiband and broadband polarization -insensitive perfect absorber devices based on a tunable and thin double split-ring metamaterial
Author(s) -
Sijia Li,
Jun Gao,
Xiangyu Cao,
Zeyu Zhao,
Yuanzhou Zheng,
Chen Zhang
Publication year - 2015
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.23.003523
Subject(s) - optics , metamaterial , materials science , broadband , metamaterial absorber , molar absorptivity , bandwidth (computing) , polarization (electrochemistry) , optoelectronics , tunable metamaterials , coating , absorption (acoustics) , physics , telecommunications , nanotechnology , chemistry , computer science
We demonstrate a polarization-insensitive perfect absorber with multiband and broadband absorption based on a tunable and thin metamaterial, which consists of a double split-ring microstructure (DSRM) on double-layer and a coating substrate. The multiband absorption at different frequencies and broadband absorption with the relative bandwidth of 90.63% from 5.69GHz to 15.12GHz, of which the absorptivity is larger than 90%, can be achieved by changing the rotary angle of the proposed DSRM perfect metamaterial absorber (DSRM-PMA). The advantages of polarized-insensitivity, wide bandwidth and multiband absorption are illuminated by the angular absorptions and the surface current distributions. The DSRM-PMA device with similar geometry in simulation is fabricated and tested to clearly validate the functionality of our design. The simulated and experimental results indicate that the DSRM-PMA performs multiband and broadband absorptions with the rotary angle of 0° and 90° respectively.