微波全介质超常媒质中多介质单元耦合诱导的透明效应机理与应用研究

项目名称： 微波全介质超常媒质中多介质单元耦合诱导的透明效应机理与应用研究

项目编号： No.61501275

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 朱磊

作者单位： 齐齐哈尔大学

项目金额： 21万元

中文摘要： 近年来，在全介质超常媒质中利用近场耦合诱导的电磁感应透明效应（英文缩写为EIT）实现低损耗超常媒质，受到了日益关注。然而，受带宽、透波率以及最高群指数的限制，无法实现低损耗宽频带慢光效应。本项目提出研究微波全介质超常媒质中多介质单元耦合诱导宽频带透明效应机理。首先，利用Mie散射理论、等效媒质理论和等效电路理论研究多个谐振单元共同作用时全介质EIT超常媒质实现宽频带、高群指数的机理；其次，研究多谐振单元之间的不同耦合方式对超常媒质带宽、色散特性的影响，提出宽频带全介质EIT超常媒质构造方法，并完成实验样品的加工、测试；最后，将全介质EIT超常媒质应用于微带天线和矩形波导的优化设计中，以证实其在改善微波器件性能中的有效性。本项目的预期研究成果有望解决目前全介质EIT超常媒质带宽和群指数的矛盾等问题，为微波段极化控制器、非对称传输器以及光频段慢光器件的实现提供坚实的理论依据和有效的实现手段。

中文关键词： 全介质超常媒质；多单元耦合；透明效应；极化变换器；矩形波导

英文摘要： Recently, the low loss metamaterial is achieved by using near field coupling induced electromagnetically induced transparence (EIT) effect in all-dielectric metamaterial, which has received increasing attention. However, the low loss and broadband slow light effect can’t be realized owing to the limitations of the bandwidth, the transmittance and the highest group index. In this program, the study of the mechanism of broad transparency effect induced by couplings between multiple dielectric units in microwave all-dielectric metamaterial is proposed. First of all, when multiple resonance units work together, the mechanism of all-dielectric metamaterial realizing the broadband and high group index is investigated by using the Mie scattering theory, equivalent medium theory and equivalent circuit theory. Second, the influences of different coupling ways between multiple resonant units on the bandwidth and dispersion characteristic for metamaterial are investigated. Moreover, the construction method of all-dielectric EIT metamaterial with wide bandwidth is proposed, and the fabrication and testing of the experimental samples are also accomplished. Finally, the all-dielectric EIT metamaterial is used in optimized designs of the microstrip antenna and the rectangular waveguide, which confirms its effectiveness in improving the performance of microwave device. The research results of this program are expected to solve the contradictory problem between bandwidth and group index in all-dielectric EIT metamaterial, which provides a solid theoretical foundation and an effective realization method for polarization controller and asymmetric transmitter at microwave frequencies and slow light devices in optical regimes.

英文关键词： All-dielectric metamaterial;coupling between multiple units ;transparent effect;polarization converter;rectangular waveguide