Multiband and broadband polarization - insensitive perfect absorber devices based on a tunable and thin double split-ring metamaterial
Multiband and broadband polarization - insensitive perfect absorber devices based on a tunable and thin double split-ring metamaterial
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DOI：
10.1364/oe.23.003523
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发表时间：
2015-02-09
期刊：
影响因子：
3.8
通讯作者：
Zhang, Chen
中科院分区：
文献类型：
--
作者：
Li, Sijia;Gao, Jun;Zhang, Chen
我们展示了一种基于可调谐薄超材料的偏振不敏感的多波段和宽带吸收的完美吸收体，该材料由双层上的双开口环微结构（DSRM）和涂层衬底组成。通过改变DSRM理想超材料吸收体（DSRM-PMA）的旋转角度，可以实现不同频率的多波段吸收，并在5.69 ~ 15.12GHz范围内实现相对带宽为90.63%的宽带吸收，其中吸收率大于90%.角反射和表面电流分布显示了其偏振不敏感、宽带和多带吸收的优点。在模拟中具有类似的几何形状的DSRM-PMA设备的制造和测试，以清楚地验证我们的设计的功能。仿真和实验结果表明，DSRM-PMA分别在0 °和90 °旋转角下实现了多频和宽带的双折射。(C)2015美国光学学会
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 degrees and 90 degrees respectively. (C) 2015 Optical Society of America