Great impacts of the dielectriclayer in a four-fan-rings-shaped metamaterial on the absorption of electromagnetic waves

被引：0

作者：

Xu, Wan ^{[1
]}

Yan, Changchun ^{[1
]}

Shi, Junxian ^{[1
]}

Jiang, Xia ^{[1
]}

Zhu, Qing ^{[1
]}

Zhang, Wenchao ^{[1
]}

Li, Dongdong ^{[1
]}

机构：

[1] Jiangsu Key Laboratory of Advanced Laser Materials and Devices, College of Physics and Electranic Engineering, Jiangsu Normal University, Xuzhou, 221116, Jiangsu

来源：

Guangxue Xuebao/Acta Optica Sinica | 2015年 / 35卷

关键词：

Absorption; Computational electromagnetic methods; Dielectriclayer; Four-fan-rings-shaped; Materials; Metamaterial; Simulation;

D O I：

10.3788/AOS201535.s116003

中图分类号：

学科分类号：

摘要：

A metamaterial that acts as a strongly resonant absorber with a periodic structure in which each unit cell consists of a metal-insulator-metal structure is presnted. The top metal layer consists of four-fan-rings-shaped gold blocks. Simulating electromagnetic responses of the structure, the structure achieves a good absorption at visible and ultraviolet frequencies is demonstrated. Furthermore, when change the shape, size and permittivity of the dielectriclayer under the four-fan-rings-shaped gold layer, the dielectriclayer has a great influence on the absorption of the metamaterial. Simulations show that the resonant frequency of the resonator ranges from visible region to ultraviolet region when the dielectriclayer set to Al2O3, four-fan-rings-shaped, and appropriate size. The great absorption of the structure over 90% has the relative absorption line width of 0.76. The proposed structure provides theoretical basis for the design and fabracation of the electromagnetic absorbers. ©, 2015, Chinese Optical Society. All right reserved.

引用

页数：6

共 24 条

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