Tuning of transmission characteristics of epsilon-near-zero metamaterials by controlling permittivity of embedded defects

2015 IEEE International Conference on Telecommunications and Photonics (ICTP) Pub Date : 2015-12-01 DOI:10.1109/ICTP.2015.7427961

Topojit Debnath, Samiul Hoque, Md. Zahurul Islam

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引用次数: 1

Abstract

In this paper we present the results of analytical and numerical studies on the effect of change of permittivity of embedded defects on the transmission characteristics of epsilon-near-zero (ENZ) metamaterials. We investigated electromagnetic wave transmission in the microwave regime through an isotropic ENZ metamaterial-based waveguide embedded with rectangular defects. We found that by adjusting the permittivity of the defect the transmission coefficient can be adjusted over a wide range, and even total transmission can be achieved. With a single rectangular defect, precise control of its permittivity is necessary to achieve and maintain near-perfect transmission through the waveguide. We found that if two defects are used in the ENZ medium, the range of permittivity for near-perfect transmission can be increased. We have also shown that this increase of permittivity range for total transmission and total reflection is also possible in anisotropic ENZ (AENZ) materials with rectangular defect(s).

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通过控制嵌入缺陷的介电常数调谐epsilon-近零超材料的透射特性

本文给出了嵌入缺陷介电常数变化对epsilon-near-zero (ENZ)超材料透射特性影响的解析和数值研究结果。我们研究了电磁波在微波波段通过嵌入矩形缺陷的各向同性ENZ超材料波导的传输。我们发现，通过调整缺陷的介电常数，可以在很大的范围内调节透射系数，甚至可以实现全透射。对于单个矩形缺陷，精确控制其介电常数对于实现和保持波导近乎完美的传输是必要的。我们发现，在ENZ介质中加入两个缺陷，可以增加接近完美传输的介电常数范围。我们还表明，在具有矩形缺陷的各向异性ENZ (AENZ)材料中，全透射和全反射的介电常数范围的增加也是可能的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2015 IEEE International Conference on Telecommunications and Photonics (ICTP)

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