多谐振U形缝隙纳米天线设计及吸收特性

发布时间：2018-06-14 18:19

  本文选题：能量收集 + U型缝隙纳米天线　； 参考：《光学精密工程》2017年08期

【摘要】：太阳能收集是解决无线传感器网络能量受限的有效手段。针对传统采用光伏电池收集太阳能的方法易受环境与光照时间限制、吸收波段窄等问题,提出了一种耦合对称U形缝隙的多谐振纳米天线阵列用于太阳能收集。该天线的单元结构是在银介质基板上刻蚀4个对称的U形缝隙,U形缝隙附近产生的表面等离激元相互耦合,使其在宽波段内产生多个谐振点,从而提高宽波段的平均吸收率。利用时域有限差分方法分析了多谐振U形缝隙纳米天线阵列的吸收特性。仿真结果表明,天线阵列在400~870nm,960~1 100nm两个波段内吸收率较高,并出现多个吸收峰,吸收峰值最大可以达到99%。
[Abstract]:Solar energy collection is an effective method to solve the energy limitation of wireless sensor networks. In order to solve the problem that the traditional solar energy collection method by photovoltaic cells is easy to be restricted by the environment and illumination time and the absorption band is narrow, a multi-resonant nanoscale antenna array coupled with symmetric U-shaped slot is proposed for solar energy collection. The element structure of the antenna is to etch four symmetrical U-shaped gaps near the U-shaped gaps on the silver dielectric substrate, and the surface isopotons are coupled with each other to produce multiple resonance points in the wide band, thus increasing the average absorptivity of the broad band. The absorption characteristics of multi-resonant U-slot nano antenna arrays are analyzed by finite difference time domain (FDTD) method. The simulation results show that the antenna array has a high absorptivity in the two 100nm bands of 400 ~ 870 nm ~ (-1) N ~ (-1) and several absorption peaks, and the maximum absorption peak value can reach to 99 ~ (th).
【作者单位】： 华东交通大学信息工程学院;
【基金】：国家自然科学基金(Nos.31101081,61162015) 江西省科技支撑项目(No.20151BBE50095) 江西省自然科学基金(No.20161BAB202061)
【分类号】：TN820
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本文编号：2018522