| 基于电介质超表面的双频带双偏振通道波前调控 |
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| 引用本文： | 刘淇,刘文玮,程化,陈树琪.基于电介质超表面的双频带双偏振通道波前调控[J].红外与激光工程,2021,50(5):20211027-1-20211027-5. |
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| 作者姓名： | 刘淇 刘文玮 程化 陈树琪 |
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| 作者单位： | 1.南开大学 物理科学学院泰达应用物理研究院 弱光非线性光子学教育部重点实验室，天津 300071 |
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| 基金项目： | 国家重点研发计划(2016YFA0301102, 2017YFA0303800)；国家杰出青年科学基金(11925403)；国家自然科学基金(11974193, 91856101) |
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| 摘 要： | 随着微纳加工技术的发展，超表面在亚波长尺度对电磁波的多维度调控展现出传统光学器件难以比拟的优势。基于电介质硅纳米柱结构构建了具有双频带响应的超表面，利用微结构对不同偏振入射光反射系数的差异，通过构建梯度几何相位实现了双波长下的异常反射；同时设计了超表面灰度成像阵列，在近红外波段实现了对正交偏振态和双波长入射具有不同响应的正负灰度图像。文中提出的超表面设计为基于超表面的多功能集成技术的发展奠定了基础。
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| 关 键 词： | 超表面 偏振态 双频带 多功能 波前调控 |
| 收稿时间： | 2021-02-01 |
Dual-wavelength and dual-polarization wavefront manipulation based on dielectric metasurfaces |
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| Affiliation: | 1.Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics and TEDA Institute of Applied Physics, Nankai University, Tianjin 300071, China2.Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China3.Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China |
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| Abstract: | With the development of nano fabrication technology, metasurfaces have shown unprecedented advantages over traditional optical designs in controlling electromagnetic waves at subwavelength scale. A dual-wavelength metasurface operating in two orthogonal polarization states based on the dielectric silicon nanopillars was proposed. The metasurface could realize anomalous reflective wavefront manipulation via the geometric phase gradient resulting from the reflection anisotropy for different incident polarizations. The proposed design also achieved positive and negative grayscale imaging arrays for dual-polarization and dual-wavelength incidence. This approach paves the way for integrated multifunctional photonic technologies based on metasurfaces. |
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