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| 基于全介质超材料的波前控制器件 |
| Wavefront control devices based on all-dielectric metamaterials |
| 投稿时间：2019-04-16 |
| DOI：10.3969/j.issn.1005-5630.2020.01.004 |
| 中文关键词: 全介质超材料 波前控制 三维结构 |
| 英文关键词:all-dielectric metamaterials wavefront control three-dimensional construction |
| 基金项目:国家自然科学基金（61205095）；上海高校青年教师培养资助计划（slg11006） |
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| 中文摘要: |
| 通过调制电磁波的相位和振幅可以达到控制电磁波的目的，为了实现超材料器件对电磁波的不同响应，利用仿真软件CST，设计了一系列基于全介质超材料的波前控制器件，包括电磁波偏转器件和聚焦透镜。通过引入不同的梯度相位差，达到调制折射电磁波偏转方向的目的，且当器件满足不同的相位分布时，透镜的焦点位置可以被定量调节。这些全介质超材料器件可通过3D打印技术快速制备，具备经济友好的特点，在微波成像系统和通信领域具有广泛的应用前景。 |
| 英文摘要: |
| Research shows that the purpose of controlling electromagnetic waves can be achieved by modulating the phase and amplitude of electromagnetic waves. In order to realize different responses of metamaterials devices to electromagnetic waves, a series of wavefront control devices based on all-dielectric metamaterials are designed by using simulation software CST in this paper, which can deflect or focus electromagnetic waves. By introducing different gradient phase difference, the deflection direction of refracted electromagnetic waves can be modulated, and the focal position of the lens can be adjusted quantitatively when the device satisfies different phase distributions. In addition, these all-dielectric metamaterials can be rapidly fabricated by 3D printing, which reduce the cost and have wide application prospects in microwave imaging systems and communication fields. |
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