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相关概念视频

Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

358
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
358

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Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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超表面极化光学:用于任意极化转换条件的相位操纵

Siqi Li1, Chen Chen2, Guoxi Wang1,3

  • 1Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, State Key Laboratory of Transient Optics and Photonics, Xi'an 710119, China.

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概括

超表面极化光学现在可以独立控制不同的极化通道. 这种新框架使得先进光学应用的任意能量分布和偏振转换效率成为可能.

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科学领域:

  • 光学和光子学 在光学和光子学.
  • 材料科学 材料科学 材料科学

背景情况:

  • 超表面极化光学操纵波浪前沿在波长尺度下.
  • 以前的方法受到完全极化转换的限制,限制了应用.

研究的目的:

  • 提出一个概括的框架,用于 metasurface极化光学.
  • 为了实现不同极化通道的独立相位控制和任意能量分配.
  • 为了实现任意极化转换效率.

主要方法:

  • 开发了一个通用的框架,用于阶段操纵在 metasurface极化光学.
  • 实验证明了三极化通道波浪前线控制.
  • 通过变化的偏振转换效率实现了任意的能量分布.

主要成果:

  • 独立的相位控制用于圆,圆形和线性极化状态.
  • 在不同的极化通道中任意分配能量.
  • 演示了超表面极化多重复合与增强的性能.

结论:

  • 拟议的框架显著改善了极化复杂化和能量分配中的地表性能.
  • 在极化光学中扩大了超表面的应用范围.
  • 能够同时对多个极化状态进行高级控制.