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Polarization Detection of Terahertz Waves using All-Silicon Metasurfaces with Tightly Focusing Behavior
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2023-07-17 , DOI: 10.1002/lpor.202300428 Hui Li 1 , Chenglong Zheng 1 , Shouxin Duan 2 , Jie Li 1, 3 , Hang Xu 1 , Yifan Li 4 , Chunyu Song 1 , Fan Yang 1 , Zhen Yue 1 , Wei Shi 1 , Yating Zhang 1 , Yun Shen 2 , Jianquan Yao 1
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2023-07-17 , DOI: 10.1002/lpor.202300428 Hui Li 1 , Chenglong Zheng 1 , Shouxin Duan 2 , Jie Li 1, 3 , Hang Xu 1 , Yifan Li 4 , Chunyu Song 1 , Fan Yang 1 , Zhen Yue 1 , Wei Shi 1 , Yating Zhang 1 , Yun Shen 2 , Jianquan Yao 1
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The manipulation of polarization states is reflected in the tailoring of light–matter interactions and has great applications in fundamental science. Nevertheless, the conventional polarization-separated detection behavior in the terahertz (THz) band is very challenging when applied to visualize the incident polarization state since its measurement requires sophisticated instrumentation. Here, the feasibility of its reconstruction of the full-Stokes parameter matrix in the THz band is explored by establishing an all-silicon decoupled metasurface based on the polarization multiplexing encoding technique. The pixelated focal spots gathered in the target plane allow us to employ more elaborate methods to extract the characteristic parameters of the incident polarization states. The resolvability of the THz polarization detection behavior with a single focal spot is further optimized benefiting from the longitudinal polarization component (Ez) generated by the tightly focused beam in the propagation direction. The capability of the Ez-component in determining the key parameters that compose the polarization ellipse is evaluated by predefining the random incident polarization on a standard Poincaré sphere. Thus, the proposed scheme offers significant advantages in future THz communications, providing opportunities for ultra-compact, high-resolution full-Stokes polarization imaging and multidimensional information processing.
中文翻译：
使用具有紧密聚焦行为的全硅超表面进行太赫兹波的偏振检测
偏振态的操纵反映在光与物质相互作用的调整中，并且在基础科学中具有很大的应用。然而，太赫兹（THz）波段的传统偏振分离检测行为在用于可视化入射偏振态时非常具有挑战性，因为其测量需要复杂的仪器。这里，通过建立基于偏振复用编码技术的全硅解耦超表面，探索其重构太赫兹频段全斯托克斯参数矩阵的可行性。聚集在目标平面上的像素化焦点使我们能够采用更复杂的方法来提取入射偏振态的特征参数。受益于传播方向上紧密聚焦的光束产生的纵向偏振分量（E z ），单焦点太赫兹偏振检测行为的分辨率得到进一步优化。通过预先定义标准庞加莱球上的随机入射偏振来评估E z分量确定构成偏振椭圆的关键参数的能力。因此，所提出的方案在未来的太赫兹通信中具有显着的优势，为超紧凑、高分辨率全斯托克斯偏振成像和多维信息处理提供了机会。
更新日期：2023-07-17
中文翻译：
使用具有紧密聚焦行为的全硅超表面进行太赫兹波的偏振检测
偏振态的操纵反映在光与物质相互作用的调整中，并且在基础科学中具有很大的应用。然而，太赫兹（THz）波段的传统偏振分离检测行为在用于可视化入射偏振态时非常具有挑战性，因为其测量需要复杂的仪器。这里，通过建立基于偏振复用编码技术的全硅解耦超表面，探索其重构太赫兹频段全斯托克斯参数矩阵的可行性。聚集在目标平面上的像素化焦点使我们能够采用更复杂的方法来提取入射偏振态的特征参数。受益于传播方向上紧密聚焦的光束产生的纵向偏振分量（E z ），单焦点太赫兹偏振检测行为的分辨率得到进一步优化。通过预先定义标准庞加莱球上的随机入射偏振来评估E z分量确定构成偏振椭圆的关键参数的能力。因此，所提出的方案在未来的太赫兹通信中具有显着的优势，为超紧凑、高分辨率全斯托克斯偏振成像和多维信息处理提供了机会。
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