基于偏振不敏感编码超表面的宽视场大角度分束器。

IF 1.4 3区 物理与天体物理 Q3 OPTICS
Yaokun Shi, Zhe Shen
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引用次数: 0

摘要

由于超表面具有控制光的优异性能,它已被用于制造各种光学器件,如分束器。超表面分束器的最新研究主要集中在实现一维分束。基于广义Snell定律,采用相位梯度超表面编码策略设计分束器,将垂直入射光分割到二维空间。同时,由于采用高度旋转对称的纳米棒作为结构单元,分束器对极化不敏感。采用不同的码组,特别是采用0和π二进制相位,所提出的分束器具有多种功能,如波束偏转、双波束分束和多波束分束。编码图的灵活设计允许光传输覆盖全视场。双束分束器和多束分束器的最大分束角分别为35.7°和28.3°。所设计的分束器功率效率均在80%以上。分束器具有体积小、易于集成、分束角大、分束面积宽、效率高等优点。它们可以应用于许多光学系统,如集成光学电路中的多路复用器和干涉仪。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Wide-field large-angle beam splitters based on polarization-insensitive coding metasurfaces.

Metasurfaces have been used to make various optical devices such as beam splitters because of their excellent capability to control light. The most recent work on metasurface beam splitters focused on realizing one-dimensional beam splitting. Based on generalized Snell's law, we designed the beam splitters using a coding strategy by phase gradient metasurfaces, which can divide vertically incident light into two-dimensional space. Meanwhile, the beam splitters are polarization-insensitive because highly rotationally symmetric nanorods are used as structure units. Using different code groups, especially applying 0 and π binary phases, the proposed beam splitters have various functions such as beam deflection, two-beam splitting, and multi-beam splitting. The flexible design of the coding maps allows the light transmission to cover a full-view field. The maximum splitting angles in two-beam and multi-beam splitters are 35.7° and 28.3°, respectively. All the designed beam splitters have a power efficiency of over 80%. The beam splitters have the advantages of small size, easy integration, large beam splitting angle, wide beam splitting area, and high efficiency. They could be applied to many optical systems, such as multiplexers and interferometers in integrated optical circuits.

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来源期刊
CiteScore
3.40
自引率
10.50%
发文量
417
审稿时长
3 months
期刊介绍: The Journal of the Optical Society of America A (JOSA A) is devoted to developments in any field of classical optics, image science, and vision. JOSA A includes original peer-reviewed papers on such topics as: * Atmospheric optics * Clinical vision * Coherence and Statistical Optics * Color * Diffraction and gratings * Image processing * Machine vision * Physiological optics * Polarization * Scattering * Signal processing * Thin films * Visual optics Also: j opt soc am a.
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