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相关概念视频

Photoelectric Effect02:26

Photoelectric Effect

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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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相关实验视频

Updated: Jan 8, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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单色单向电子驱动光子源 单色单向电子驱动光子源

Yuxiang Chen1, Yuchen Dai1, Guangyi Tao1

  • 1State Key Laboratory for Mesoscopic Physics, Collaborative Innovation Center of Quantum Matter, Nano-Optoelectronics Frontier Center of Ministry of Education, School of Physics, Peking University, Beijing 100871, China.

Nano letters
|December 16, 2025
PubMed
概括
此摘要是机器生成的。

我们开发了一种可调节的电子驱动光子源 (EDPHS),具有高定向性和极化纯度. 这一突破使得先进的纳米级成像和芯片上的光源成为可能.

关键词:
阴道光发光的光泽.定向排放的方向性排放表面等离子体是什么状体激发是指状体激发.

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科学领域:

  • 纳米光子学 纳米光子学
  • 量子光学是一种量子光学.
  • 材料科学 材料科学 材料科学

背景情况:

  • 与纳米结构相互作用的高能电子束产生连贯辐射.
  • 电子驱动光子源 (EDPHS) 对纳米光子应用具有前景,包括集成光源和电子显微镜.

研究的目的:

  • 为了实现单色和单向EDPHS,可调节波长和发射方向.
  • 探索选择性 toroidal 双极模式激发对于控制 EDPHS 属性的潜力.

主要方法:

  • 在纳米结构中选择性激发 toroidal 双极模式.
  • 利用独特的电磁模式特性,具有较低的辐射损失.

主要成果:

  • 实现一个高度定向的,线性极化EDPHS (DOLP 0.999).
  • 获得了高质量因子 (Q-因子) 35.
  • 在波长和发射方向上都证明了可调性.

结论:

  • 开发的EDPHS可以在纳米尺度上精确控制光特性.
  • 异常的单色和极化纯度使它成为电子显微镜中的连贯参考源的理想选择,使得超快的光谱干扰测量和纳米级动态的相位成像成为可能.