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相关概念视频

X-ray Crystallography02:18

X-ray Crystallography

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...
Determination of Crystal Structures01:29

Determination of Crystal Structures

In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...

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相关实验视频

Updated: Jul 23, 2026

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
13:44

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

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通过增材制造制造的THz Bragg结构.

C Harrison Brodie, Isaac Spotts, Christopher M Collier

    Applied optics
    |September 14, 2023
    PubMed
    概括

    3D打印的特拉赫兹 (THz) 布拉格结构为先进的THz应用提供可调节的频率过. 这种制造方法简化了为科学和技术创造专门的THz光子元件.

    科学领域:

    • 太赫兹 (THz) 是科学和技术的频率.
    • 这些光子设备是光子设备.
    • 增材制造 增材制造是一种增材制造.

    背景情况:

    • 推进THz科学需要专门的光子元素,具有量身定制的吸收和折射性能.
    • 增材制造,特别是3D打印,为制造复杂的THz光子结构提供了一种简化方法.
    • 周期布拉格结构是选择性频率过的关键THz光子元素.

    研究的目的:

    • 为了展示使用3D打印制造的THz Bragg结构.
    • 描述材料特性和研究3D打印THz Bragg结构的理论运行.
    • 为了实验验证3D打印的THz Bragg结构的性能,用于可调节的频率过.

    主要方法:

    • 使用高冲击聚乙烯的化丝制造 (3D打印) 制造THz Bragg结构.
    • 使用特拉赫兹时域光谱学 (THz-TDS) 进行聚乙烯材料的表征.
    • 使用有限差异时间域 (FDTD) 方法进行电磁模拟,以建模结构的几何和操作.
    • 使用专门的THz测试台对制造的THz Bragg结构进行实验评估.

    主要成果:

    • 从高冲击聚烯成功制造了一个3D打印的THz Bragg结构.
    • 聚乙烯的THz模式光学性能的表征.

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    Multi-material Ceramic-Based Components – Additive Manufacturing of Black-and-white Zirconia Components by Thermoplastic 3D-Printing (CerAM - T3DP)
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    Multi-material Ceramic-Based Components – Additive Manufacturing of Black-and-white Zirconia Components by Thermoplastic 3D-Printing (CerAM - T3DP)

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  • 通过FDTD模拟和实验结果之间的协议来证明可调频过能力.
  • 验证用于创建功能THz光子元件的3D打印方法.

    • 结论:

    • 3D打印为制造THz Bragg结构提供了一种可访问和有效的方法.
    • 展示的THz Bragg结构展示了可调节的频率过,通过模拟和实验验证.
    • 这项工作推动了专门的THz光子元件的开发,为更广泛的THz技术应用铺平了道路.