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相关概念视频

X-ray Crystallography02:18

X-ray Crystallography

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The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
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Symmetry in Maxwell's Equations01:28

Symmetry in Maxwell's Equations

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Once the fields have been calculated using Maxwell's four equations, the Lorentz force equation gives the force that the fields exert on a charged particle moving with a certain velocity. The Lorentz force equation combines the force of the electric field and of the magnetic field on the moving charge. Maxwell's equations and the Lorentz force law together encompass all the laws of electricity and magnetism. The symmetry that Maxwell introduced into his mathematical framework may not be...
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相关实验视频

Updated: Jul 16, 2025

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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对称的异构性使得光子学中的动态衍射控制成为可能.

Hicham Mangach, Youssef El Badri, Abdelhamid Hmima

    Optics express
    |September 15, 2023
    PubMed
    概括

    研究人员通过对光子晶体 (PhC) 进行异型缩放来克服光子设备中的衍射极限. 这种方法显著提高了衍射极限,使高频波导和在连续 (QBICs) 中观察准束状态成为可能.

    科学领域:

    • 光子学 是一个光子学.
    • 纳米技术纳米技术
    • 材料科学 材料科学 材料科学

    背景情况:

    • 微型光子设备面临由于衍射极限的限制,阻碍了与电子尺寸的兼容性.
    • 纳米制造技术的进步还没有完全解决光子设备的衍射极限挑战.

    研究的目的:

    • 通过光子晶体 (PhCs) 的异型缩放来克服光子设备中的衍射极限.
    • 为了实现沿 ΓX 方向控制的衍射极限.
    • 探索高频波导的可能性,并研究连续体中的准束状态 (QBICs).

    主要方法:

    • 光子晶体 (PhC) 形状的异型缩放.
    • 用1/2和1/4的因子将垂直于波传播 (y方向) 的方向缩小.
    • 对不对称的二元网络类型光子晶体的分析.

    主要成果:

    • 通过异构缩放,显著提高了两到四个数量级的衍射极限.
    • 在 ΓX 方向沿着控制的衍射极限的演示.
    • 在不对称的二元网络类型的PhC中,连续体中的准束状态 (QBICs) 的示例.

    结论:

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  • PhCs的异型缩放是一种有效的策略,可以克服衍射极限.
  • 这种方法使得高频波导在形结构中成为可能.
  • 这项研究揭示了QBIC在特定的PhC结构中的存在,开辟了光子研究的新途径.