Broadband long-wave infrared metamaterial absorbers based on germanium resonators

doi:10.1016/j.rinp.2023.106660

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	Broadband long-wave infrared metamaterial absorbers based on germanium resonators
	F. M. Yang, Z. Z. Liang, X. Y. Shi, X. Q. Zhang, D. J. Meng, R. Dai, S. T. Zhang, Y. Jia, N. T. Yan, S. X. Li and Z. H. Wang
	2023
发表期刊	Results in Physics
ISSN	2211-3797
卷号	51 页码:6
摘要	The broadband metamaterial perfect absorbers over various incident angles are highly significant in long-wave infrared (LWIR) detection. Previous research on LWIR metamaterial absorbers has mainly focused on metallic resonators. Here, we propose two broadband LWIR metamaterial absorbers that use dielectric resonators instead. The germanium (Ge) resonators on the top layer excite resonance modes that control the equivalent impedance of the structure, which acts on the high-lossy Si3N4-Ti reflecting layer to assume the absorption. Firstly, we designed a three-layer structure of Ge-Si3N4-Ti, which achieved a broadband absorption with an average absorptivity of 93.1 % in the 8-12 & mu;m range. The absorption ratio of metal can be effectively reduced by replacing the metal. Then, to further enhance the absorptivity, we inserted a Si3N4 layer into the Ge layer, increasing the 90 % absorption bandwidth to 7.96-14.16 & mu;m and the average absorptivity in 8-14 & mu;m to 96.5 %. Compared to metamaterial absorbers based on metallic resonators, dielectric resonators with a large feature size make fabricating easier. Our proposed meta -material absorber provides ultra-wideband absorption covering the LWIR range. In addition, it is insensitive to the incident angle, making it a potential candidate for thermal imaging and broadband thermal emission applications.
DOI	10.1016/j.rinp.2023.106660
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收录类别	sci
语种	英语
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/68083
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	F. M. Yang, Z. Z. Liang, X. Y. Shi, X. Q. Zhang, D. J. Meng, R. Dai, S. T. Zhang, Y. Jia, N. T. Yan, S. X. Li and Z. H. Wang. Broadband long-wave infrared metamaterial absorbers based on germanium resonators[J]. Results in Physics,2023,51:6.
APA	F. M. Yang, Z. Z. Liang, X. Y. Shi, X. Q. Zhang, D. J. Meng, R. Dai, S. T. Zhang, Y. Jia, N. T. Yan, S. X. Li and Z. H. Wang.(2023).Broadband long-wave infrared metamaterial absorbers based on germanium resonators.Results in Physics,51,6.
MLA	F. M. Yang, Z. Z. Liang, X. Y. Shi, X. Q. Zhang, D. J. Meng, R. Dai, S. T. Zhang, Y. Jia, N. T. Yan, S. X. Li and Z. H. Wang."Broadband long-wave infrared metamaterial absorbers based on germanium resonators".Results in Physics 51(2023):6.

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