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相关概念视频

Photoelectric Effect02:26

Photoelectric Effect

When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...

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使用原子薄的黑进行宽带电光偏振转换

Souvik Biswas1, Meir Y Grajower1, Kenji Watanabe2

  • 1Thomas J. Watson Laboratory of Applied Physics, California Institute of Technology, Pasadena, CA 91125, USA.

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|October 21, 2021
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概括

研究人员在Fabry-Pérot腔内使用三层黑 (TLBP) 在光子系统中演示了可重新配置的极化控制. 这一突破提供了跨电信波长的宽带偏振转换.

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科学领域:

  • 光子学和材料科学
  • 光电子产品
  • 纳米技术

背景情况:

  • 对于光子系统来说, 积极的极化控制至关重要.
  • 现有的方法通常依赖于庞大的离散结构或液晶.
  • 需要紧,可调节的极化控制解决方案.

研究的目的:

  • 为了证明电气可重新配置的极化转换.
  • 探索使用范德瓦尔斯分层材料来控制极化.
  • 实现跨电信波长的宽带偏振控制.

主要方法:

  • 将三层黑 (TLBP) 整合到法布里-佩罗腔中.
  • 在TLBP中利用双断的电调性.
  • 通过电信波长 (1410-1575 nm) 进行极化转换.

主要成果:

  • 实现了光谱宽带偏振控制.
  • 通过光谱调节在庞卡雷球的很大一部分中证明了极化状态的产生.
  • 展示了使得极化转换的电调, 覆盖了近一半的普恩卡雷球.
  • 观察到具有高动态范围的多功能线性到圆形和交叉偏振转换.

结论:

  • 在Fabry-Pérot腔中的三层黑使电气可重构的极化控制成为可能.
  • 这种方法为光子系统提供宽带和多功能极化转换.
  • 这项技术在先进的光通信和传感方面具有潜在的应用.