Multitasking Shared Aperture Enabled with Multiband Digital Coding Metasurface,Advanced Optical Materials

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Multitasking Shared Aperture Enabled with Multiband Digital Coding Metasurface
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-08-27 , DOI: 10.1002/adom.201800657
Guo Dong Bai _{1,

2} , Qian Ma _{1,

2} , Shahid Iqbal _{1,

2} , Lei Bao _{1,

2} , Hong Bo Jing _{1,

2} , Lei Zhang _{1,

2} , Hao Tian Wu _{1,

2} , Rui Yuan Wu _{1,

2} , Hao Chi Zhang _{1,

2} , Cheng Yang _{1,

2} , Tie Jun Cui _{1,

2}

Affiliation

Digital coding metasurface is aimed at building up a bridge between physics and information science. Higher information capacity of the digital coding metasurface means more powerful ability to control electromagnetic waves. Here, a multiband digital coding metasurface to improve the information capacity is proposed. The digital coding structures can provide 2‐bit digital states at three separate frequency bands (C, X, and Ku). It is shown that the proposed metasurface can eliminate the in‐band interference and path degradation by introducing an operator of frequency‐hopping spread spectra, from which flexible beam controls can be designed independently in every operating band. To demonstrate the capability and the compatibility, a multifunctional digital coding metasurface which can perform optical illusion, scattering reduction, and generation of orbital angular momentum in a shared aperture is presented. Numerical simulations and measured results have very good agreements, verifying excellent performance of the multiband digital coding metasurface. The proposed method opens opportunities to improve the information capacity of the digital coding metasurface and paves novel ways to multitasking systems on photonic applications.

中文翻译：

具有多频带数字编码元表面的多任务共享光圈

数字编码超表面的目的是在物理学和信息科学之间架起一座桥梁。数字编码超表面的更高信息容量意味着更强大的控制电磁波的能力。在此，提出了一种提高信息容量的多频带数字编码超表面。数字编码结构可以在三个单独的频带（C，X和Ku）上提供2位数字状态。结果表明，提出的超颖表面可以通过引入跳频扩频算子来消除带内干扰和路径退化，从中可以在每个工作频带中独立设计灵活的波束控制。为了展示其功能和兼容性，可以使用多功能数字编码超表面来执行光学幻觉，减少散射，并介绍了在共享孔径中产生轨道角动量的过程。数值模拟和测量结果具有很好的一致性，证明了多频带数字编码超表面的出色性能。所提出的方法为改善数字编码超表面的信息容量提供了机会，并为光子应用中的多任务系统铺平了新途径。

更新日期：2018-08-27

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