Tuning the effective properties of metamaterials by changing the substrate properties
Tuning the effective properties of metamaterials by changing the substrate properties
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DOI：
10.1063/1.2407275
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发表时间：
2007-01
影响因子：
3.2
通讯作者：
Z. Sheng;V. Varadan
中科院分区：
文献类型：
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作者：
Z. Sheng;V. Varadan
材料的可调谐特性在许多应用中是高度期望的。具有负特性（介电常数、磁导率或两者）的超材料可以有许多应用，如果这些特性可以被制成可调谐的或者可以在正特性行为和负特性行为之间交替切换的话。本文是一个数值研究的基板属性的影响的有效属性的超材料板。我们提出了两个不同的基板厚度的一个特定的开口环谐振器结构的模拟结果和测量数据，并表现出非常好的协议。然后，使用有限元模拟，改变介电常数的基板从1到14，而保持其物理厚度不变，我们表明，谐振频率下降从1.16到1.66 GHz。当基片的物理厚度在0.05 ~ 2 mm范围内变化时，保持其介电常数不变，谐振频率从13.2GHz下降到19.2GHz。在每一种情况下，有效折射率是相对的。
Tunable properties of materials are highly desirable in many applications. Metamaterials with negative properties (permittivity, permeability, or both) can have many applications if such properties can be made tunable or can be switched alternatively between positive and negative property behavior. This paper is a numerical study of the effect of substrate properties on the effective properties of a metamaterial slab. We present both simulation results and measurement data for a specific split-ring resonator structure for two different substrate thicknesses and demonstrate very good agreement. Then, using finite element simulation, varying the permittivity of the substrate from 1 to 14 while keeping its physical thickness fixed, we show that the resonance frequency drops from ∼16to∼6GHz. Alternately, when the physical thickness of the substrate is varied from 0.05to2mm, keeping its permittivity fixed, the resonance frequency decreases from ∼13.2to∼9.2GHz. In each case, the effective refractive index is re...