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Isotropic Holographic Metasurfaces for Dual-Functional Radiations without Mutual Interferences

机译：各向同性全息超表面用于双功能辐射而无相互干扰

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摘要

The dual-functional and/or multifunctional devices have huge fascinations and prospects to conveniently integrate complex systems with low costs. However, most of such devices are based on anisotropic media or anisotropic structures. Here, a new method is proposed to design planar dual-functional devices using an isotropic holographic metasurface, in which two different functions are written on the same holographic interference pattern with no mutual coupling. When the metasurface is excited by two orthogonally ported sources, the corresponding dual functions can be controlled by the object waves, which are not affected by each other due to suppression of mutual interference. The proposed metasurface is composed of subwavelength-scale isotropic metallic patches on a grounded dielectric. In this specific design, double-beam and double-polarization radiate devices are realized independently by the orthogonal excitations. Based on the theoretical analysis, scanning radiate beams that are only controlled by frequency with different performances under orthogonal polarizations are demonstrated. To the best of our knowledge, this is the first time for actualizing dual-functional devices using isotropic textures. Full-wave simulations and experimental results in the microwave frequencies are presented to validate the proposed theory and confirm the corresponding physical phenomena.
机译：双功能和/或多功能设备具有巨大的魅力和前景，可以方便地以低成本集成复杂的系统。然而，大多数这样的设备基于各向异性介质或各向异性结构。在此，提出了一种使用各向同性全息超表面来设计平面双功能设备的新方法，其中在相同的全息干涉图案上书写两个不同的功能，而没有相互耦合。当超表面被两个正交端口的源激发时，相应的双重功能可以由物波控制，该物波由于相互干扰的抑制而互不影响。拟议的超颖表面由接地电介质上的亚波长尺度的各向同性金属斑块组成。在该特定设计中，通过正交激励独立地实现了双光束和双极化辐射装置。在理论分析的基础上，对正交极化下仅受频率控制，性能不同的辐射束进行了演示。据我们所知，这是第一次使用各向同性纹理实现双功能设备。提出了在微波频率下的全波模拟和实验结果，以验证所提出的理论并确认相应的物理现象。

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  • 来源
    《Advanced Functional Materials》 |2016年第1期|29-35|共7页
  • 作者

    Li Yun Bo; Cai Ben Geng; Cheng Qiang; Cui Tie Jun;

  • 作者单位

    Southeast Univ, State Key Lab Millimeter Waves, Nanjing 210096, Jiangsu, Peoples R China;

    Southeast Univ, State Key Lab Millimeter Waves, Nanjing 210096, Jiangsu, Peoples R China;

    Southeast Univ, State Key Lab Millimeter Waves, Nanjing 210096, Jiangsu, Peoples R China|Cooperat Innovat Ctr Terahertz Sci, Chengdu 610054, Peoples R China;

    Southeast Univ, State Key Lab Millimeter Waves, Nanjing 210096, Jiangsu, Peoples R China|Cooperat Innovat Ctr Terahertz Sci, Chengdu 610054, Peoples R China;

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