Structure-insensitive switchable terahertz broadband metamaterial absorbers

被引：21
作者：
Qi, Limei [1 ]
Liu, Chang [1 ]
Zhang, Xia [2 ]
Sun, Dandan [1 ]
Shah, Syed Mohsin Ali [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Sch Elect Engn, Beijing 100876, Peoples R China
[2] Qufu Normal Univ, Sch Phys & Phys Engn, Shandong Prov Key Lab Laser Polarizat & Informat, Qufu 273165, Peoples R China
来源：
APPLIED PHYSICS EXPRESS | 2019年 / 12卷 / 06期
基金：
中国国家自然科学基金;
关键词：
TRANSITION; WAVE;
D O I：
10.7567/1882-0786/ab213b
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A nearly structural-insensitive switchable broadband terahertz metamaterial absorber is proposed, which consists of several gold rods and a vanadium dioxide (VO2) ground plane separated by a dielectric spacer. By controlling the temperature of VO2, state of the absorber can be switched from "on" to "off" in the frequency range of 1.116-1.564 THz. The physical mechanism of the absorber is given based on the wave-interference theory and field distributions. Interestingly, the proposed absorber shows a similar performance for random arrangements of a given number of rods on the top layer, which could greatly reduce the requirement of fabrication accuracy. (C) 2019 The Japan Society of Applied Physics
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页数：6
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