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相关概念视频

Interference and Diffraction02:18

Interference and Diffraction

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Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
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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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Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing
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在高度失焦的THz光束中衍射效应.

Felix Gorka, Enrique Castro-Camus, Daniel M Mittleman

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    此摘要是机器生成的。

    定向的太赫兹光束对于通信至关重要,因为它的损失更高,衍射更小. 通过阻塞进行光束传输的测量与弗雷内尔衍射理论进行了比较,以帮助超宽带技术的发展.

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    科学领域:

    • 物理 物理学 物理
    • 电气工程 电气工程
    • 光学工程是指光学工程.

    背景情况:

    • 太赫兹 (THz) 通信需要定向光束来克服显著的传输损失.
    • 较短的THz波长导致较少的衍射,影响信号通过障碍物传播.

    研究的目的:

    • 测量与阻塞相互作用的适度分离的THz光束的频率依赖的传输损失.
    • 将实验数据与基于弗雷内尔衍射理论的准光学模型进行比较.

    主要方法:

    • 测量带有厘米尺度腰的光束的传输损失.
    • 弗雷内尔衍射理论的应用,用于光束阻塞相互作用的准光学处理.

    主要成果:

    • 对遇到各种阻塞的THz光束的量化频率依赖的传输损失.
    • 验证了准光学模型在预测光束与障碍物的相互作用方面的准确性.

    结论:

    • 实验数据与THz束相互作用的弗雷内尔衍射预测一致.
    • 这些发现对于设计未来100 GHz以上超宽带通信系统至关重要.