红外与毫米波学报, 2014, 33 (3): 227, 网络出版: 2014-06-30
孔型对金属介质金属三明治结构超材料的透射率和负折射率的影响
Influence of hole shape on the transmission and negative refractive index properties of metal-dielectric-metal metamaterial
摘要
通过改变长方形孔的长度，利用数值模拟研究了金属介质金属三明治结构超材料的透射率，负折射(NRI)率和品质因数(FOM)等性质.研究结果表明，随着长方形孔的长度的增大，低频透射峰和最大透射峰都出现了红移现象.长方形孔的负折射率和负折射带宽则随着长方形孔的长度的增大而减小.这意味着可以通过调节金属介质金属三明治结构超材料的孔阵列的长度获得较高的透射率或者负折射率.这些结果为开发太赫兹范围的光电器件提供可能的理论.
Abstract
The transmission, negative refractive index (NRI) and figure of merit (FOM) of metal-dielectric-metal (MDM) sandwiched metamaterial, which is perforated with different length of rectangular holes, are numerically studied. The low-frequency transmission peak and maximum transmission peaks of rectangular hole are red-shifted with the increasing of the length of holes. The NRI and the frequency bandwidth of NRI of the rectangular holes are reduced with the increase of the length of holes. It becomes possible to obtain a higher transmission or NRI of metamaterial by adjusting the length of the rectangular holes on MDM metamaterial arrays.
钟敏. 孔型对金属介质金属三明治结构超材料的透射率和负折射率的影响[J]. 红外与毫米波学报, 2014, 33(3): 227. ZHONG Min. Influence of hole shape on the transmission and negative refractive index properties of metal-dielectric-metal metamaterial[J]. Journal of Infrared and Millimeter Waves, 2014, 33(3): 227.
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