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71.
Balamati Choudhury Sanjana Bisoyi Pavani Vijay Reddy Manjula S. R. M. Jha 《计算机、材料和连续体(英文)》2014,39(3):179-215
The terahertz spectrum of electromagnetic waves is finding its position in various applications of day to day life because of its unique properties, including the penetration through opaque materials. Naturally occurring materials in this range are rare due to the display of a natural breakpoint of both electric, and magnetic resonances in these materials. However recent advances in artificially engineered materials, which show resonance in this region are able to harness desirable properties in the terahertz region. In this paper, terahertz design and fabrication issues have been explored along with their applications. A brief review of metamaterial terahertz applications has been carried out including metamaterial absorbers, filters, modulators, switches, lenses, and cloaking structures. The various patterns of metamaterial unit cells are discussed elaborately along with the possibility of flexible active terahertz structures. 相似文献
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We have introduced metamaterial superstrate in microstrip-based radiating structure to increase its bandwidth. Split ring resonators are added as metamaterial metallic inclusion in superstrate of the conventional design. This changes the basic structure of the material. Material properties such as permittivity and permeability changed due to change in the structure. The change in its material properties enhances the bandwidth of the antenna. The antenna is meandered to achieve better performance at the edges which in a way improve the radiation path of the patch. Here, the proposed antenna works on three bands in the range 3–8?GHz. Maximum 60% bandwidth is enhanced in the third band. The voltage standing wave ratio and return loss (S11) of the entire three bands are shown in the paper. The antenna works on 3.51, 4.86 and 7.8?GHz. Design results are obtained by high-frequency structure simulator which is used for simulating microwave passive components. 相似文献
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Yong Zhi Cheng Yong Li Yang Yu Jie Zhou Zhe Zhang Xue Song Mao Rong Zhou Gong 《Journal of Modern Optics》2013,60(17):1675-1680
AbstractA complementary Y-shaped chiral metamaterial (CYCMM) is proposed for the realization of giant optical activity and circular polarization with strong circular dichroism (CD) simultaneously for terahertz (THz) waves. It is demonstrated that the proposed CYCMM can achieve 90° linear polarization rotation around 2.13 THz and a giant CD effect at 2.38 THz through full-wave simulations. The mechanism of the giant CD effect and optical activity is illustrated by simulated surface current distribution. Due to strong optical activity and the CD effect, the proposed CYCMM is useful for the development of integrated terahertz spectroscopic and imaging devices. 相似文献
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超材料研究文献计量分析 总被引:2,自引:1,他引:1
超材料(Metamaterial)是一门日益兴起的新学科.近年来超材料及其应用技术正飞速发展,其研究论文及成果迅速增加.利用文献计量分析方法和汤姆森数据分析器(TDA)软件对超材料1998-2007年间的研究论文进行分析,主要包括研究论文的年代与国家分布、学科领域分布、研究机构分布、期刊分布、作者分布等,并对研究主题进行了分析. 相似文献
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