Acta Optica Sinica, Volume. 35, Issue s1, 116003(2015)
Great Impacts of the Dielectriclayer in a Four-Fan-Rings-Shaped Metamaterial on the Absorption of Electromagnetic Waves
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.
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Xu Wan, Yan Changchun, Shi Junxian, Jiang Xia, Zhu Qing, Zhang Wenchao, Li Dongdong. Great Impacts of the Dielectriclayer in a Four-Fan-Rings-Shaped Metamaterial on the Absorption of Electromagnetic Waves[J]. Acta Optica Sinica, 2015, 35(s1): 116003
Category: Materials
Received: Jan. 27, 2015
Accepted: --
Published Online: Jul. 27, 2015
The Author Email: Wan Xu (948292075@qq.com)