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相关概念视频

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The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
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Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.
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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
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相关实验视频

Updated: Jan 29, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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单层超表面使得线性极化器和四分之一波板用于芯片级原子钟.

Taolong Wang1,2, Zhiqiang Li1, Ting Liang1

  • 1Key Laboratory of Micro/Nano Devices and Systems, Ministry of Education, North University of China, Taiyuan 030051, China.

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概括

一个新的超表面作为线性偏振器和四分之一波板,增强芯片级原子钟的偏振控制. 这一突破改善了紧计时系统中的频率稳定性.

关键词:
原子蒸汽细胞是原子蒸汽细胞.芯片规模的原子钟基于地表LP和QWP的地表LP和QWP是基于地表LP和QWP的LP和QWP.

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科学领域:

  • 光子学和元表面学
  • 原子频率标准 原子频率标准
  • 微型电子产品 微型电子产品

背景情况:

  • 芯片级原子钟 (CSACs) 需要精确的偏振控制以获得最佳性能.
  • 传统的极化元件可能是重的,限制了小型化.
  • 超表面为紧的光学功能提供了一个有前途的路线.

研究的目的:

  • 设计和演示一个单层超表面作为线性偏振器和四分之一波板 (LP&QWP) 的功能.
  • 将这种超表面集成到芯片级原子钟原型中,以提高极化控制和频率稳定性.
  • 为了在单一的超表面层内实现同时的极化控制和光功率平衡.

主要方法:

  • 用有限差异时间域 (FDTD) 模拟来设计和优化 metasurface.
  • 超表面设备是在光学玻璃基板上制造的.
  • 实验性表征验证了极化操纵 (PER,DOP) 和CSAC频率稳定性.

主要成果:

  • 超表面有效地将线性偏振光转换为右手循环偏振光.
  • 达到了4.8dB的极化灭绝比 (PER) 和74.2%的极化度 (DOP).
  • 该CSAC原型在1秒钟时表现出9.29 × 10-11的短期频率稳定性,在1万秒钟时表现出1.59 × 10-11的频率稳定性.

结论:

  • 开发的超表面为CSACs提供了有效的极化控制.
  • 单层超表面可以同时控制极化和光功率平衡.
  • 这项工作为微型原子钟的极化控制和频率稳定建立了可行的方法.