激光与光电子学进展, 2014, 51 (10): 101601, 网络出版: 2014-09-10  

一种新的超材料放大装置简化参数设计方法

A New Simplified Parameter Designing Method for Metamaterial Amplifying Device
作者单位
云南大学信息学院无线创新实验室, 云南 昆明 650091
摘要
超材料放大装置能够将物体任意放大,其在小目标识别和检测中有广泛的潜在应用。为了促进该装置的实际应用,基于变换光学原理提出了一种新的简化材料参数设计方法。该方法通过选择适当的变换方程,使得材料参数的径向和角向分量为常数而仅轴向分量随半径变化,同时还能确保装置的外边界与自由空间阻抗完全匹配。全波仿真结果验证了该方法的有效性和放大装置的良好性能。此外,分析了材料损耗和参数抖动对装置性能的影响,扩展了变换光学理论的应用,为超材料器件的参数简化提供了一种新的、可行的解决方案。
Abstract
Metamaterial amplifying device can make an object enlarged as one desire, and its potential application to small object identification and detection is foreseeable. To facilitate the practical application of such a device, a new simplified parameter designing method is proposed through choosing appropriate transformation equation based on the theory of transformation optics. The virtues of such a method are that not only the radial and azimuthal parameters are constants and only axial parameter varies with radius, but also, there exist no undesired reflections due to perfect impedance matching to free space at outer boundary. Fullwave simulations confirm the effectiveness of the proposed method and the good performance of the designed amplifying device. Moreover, the effects of material loss and parameter deviation on the performance of the device are also investigated. This work expands the application of transformation optics, and also provides a new and feasible solution to simplify the parameters of metamaterial devices.

梁岩, 李廷华, 黄铭, 杨晶晶, 袁刚. 一种新的超材料放大装置简化参数设计方法[J]. 激光与光电子学进展, 2014, 51(10): 101601. Liang Yan, Li Tinghua, Huang Ming, Yang Jingjing, Yuan Gang. A New Simplified Parameter Designing Method for Metamaterial Amplifying Device[J]. Laser & Optoelectronics Progress, 2014, 51(10): 101601.

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