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相关概念视频

Singularity Functions for Shear01:26

Singularity Functions for Shear

407
In structural analysis, singularity functions are crucial in simplifying the representation of shear forces in beams under discontinuous loading. These functions describe discontinuous  variations in shear force across a beam with varying loads by using a single mathematical expression, regardless of the complexity of the loading conditions. The singularity functions are derived from creating a free-body diagram of the beam and then making conceptual cuts at specific points to examine the...
407

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相关实验视频

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Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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单个元元表面的相位表征.

Yanel Tahmi1,2, Matthieu Ansquer2, Pierre-Marie Coulon1

  • 1Université Côte d'Azur, CNRS-CRHEA, Rue Bernard Gregory, Valbonne 06560, France.

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概括
此摘要是机器生成的。

四波横切线干扰仪准确地测量了来自元表面的轨道角动量 (OAM) 束. 潘查拉特纳姆-贝里相位元表面显示出比有效折射率更好的性能.

关键词:
QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI QLSI计量学 计量学 计量学 计量学这是一个光学 vortex.阶段阶段阶段阶段的阶段.单一的地表转移.

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科学领域:

  • 光学和光子学 在光学和光子学.
  • 地表表面技术的技术.
  • 量子信息科学 量子信息科学

背景情况:

  • 具有轨道角动量 (OAM) 的光束的受控生成和表征对于先进的应用至关重要.
  • 超表面是结构光的强大工具,但测量它们复杂的相位形状,特别是相位奇点,是具有挑战性的.

研究的目的:

  • 应用四波侧切干扰仪 (QLSI) 来准确地映射由元表面产生的OAM光束的相位.
  • 基于有效折射率 (ERI) 调制和Pancharatnam-Berry (PB) 阶段对OAM光束生成的元表面的性能进行比较.

主要方法:

  • 采用四波侧切干扰仪 (QLSI) 作为定量相位成像技术.
  • 获取了由元表面生成的OAM光束的空间分辨率相位图.
  • 用ERI调制和PB相机制设计的经过评估的元表面.

主要成果:

  • QLSI成功地重建了OAM光束的完美和不完美的单相形状.
  • 与基于ERI的元表面相比,PB相元表面显示出更高的相位精度和更高的制造容忍度.
  • QLSI被证明是一个可靠的工具来表征复杂的光学场和验证 metasurface性能.

结论:

  • QLSI是一种强大的计量技术,用于表征结构光,特别是OAM光束.
  • PB相元表面在结构光发电的性能和制造方面具有优势.
  • 这项工作验证了QLSI作为下一代光子设备使用结构光的关键诊断工具.