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相关概念视频

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

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The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
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相关实验视频

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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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可见的多波长无色偏光器使用单层自由形元表面.

Taewon Choi1, Chulsoo Choi1,2, Junseo Bang1

  • 1Inter-University Semiconductor Research Center, School of Electrical and Computer Engineering, Seoul National University, 1 Gwanakro, Gwanak-Gu, Seoul 08826, Republic of Korea.

Nano letters
|August 27, 2024
PubMed
概括

这项研究引入了一种新的单层超表面,用于可见光中无色色偏差的光束偏移. 这种创新的光学元件简化了制造,并为先进的光学系统提供了高效率.

关键词:
无色的设备是无色的设备.灯束转向的方向盘.介电变压器的表面变压器自由形态的地表元层.多功能地表转移器拓优化优化拓学的优化

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科学领域:

  • 光学和光子学 在光学和光子学.
  • 超材料科学科学 超材料科学
  • 纳米技术 纳米技术

背景情况:

  • 传统的光学衍射器,如镜和镜子,在形状因子和色谱偏差方面面临限制.
  • 超表面具有潜力,但通常在近红外线中运行或需要复杂的多层制造.

研究的目的:

  • 为在可见光谱中开发单层超表面,以实现多波长,无色色偏差的偏移.
  • 为了克服与现有的地表技术相关的制造挑战.

主要方法:

  • 采用了强大的自由形设计策略,以简化单层元表面的制造.
  • 利用合布洛赫模式分析来理解物理性质.
  • 选择了红色,绿色和蓝色波长的特定衍射顺序,以获得相同的波长-衍射顺序产物.

主要成果:

  • 在可见光的41.3°的一致角度实现了多波长色谱无偏差的偏移.
  • 已经证明了高的折射效率.
  • 实验性制造和表征验证了超表面的有效性.

结论:

  • 拟议的单层超表面为无色偏差的光束偏移提供了一个实际的解决方案.
  • 这项技术在增强现实/虚拟现实 (AR/VR),数字摄像头和其他高质量的光学系统中具有很大的应用潜力.