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时间折射光学与单周期调制光学.

Eran Lustig1, Ohad Segal1, Soham Saha2

  • 1Physics Department and Solid State Institute, Technion-Israel Institute of Technology, Haifa, Israel.

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概括
此摘要是机器生成的。

研究人员用单个光学周期时间接口实验证明了光学时间折射. 这种在epsilon-near-zero材料中观察到的超快现象涉及光脉冲的光谱转移,这是由于折射率的快速变化造成的.

关键词:
光子时间晶体的光子时间晶体.时间变化的媒体.超快光学是一种超快的光学.

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科学领域:

  • 光学和光子学 在光学和光子学.
  • 超快速科学 超快速科学
  • 材料科学 材料科学 材料科学

背景情况:

  • 光学时间折射是一种现象,由于介质的折射率的快速变化,光的时间性质发生变化.
  • 之前的研究已经探索了时间折射,但在单一光学周期时间尺度上的实验性研究具有挑战性.
  • 接近零的埃普西隆 (ENZ) 材料由于其接近零的电容性,具有独特的光学特性,这使得它们对操纵光线充满希望.

研究的目的:

  • 实验性地研究在极短的时间尺度上发生的光学时间折射现象,特别是在单个光学周期内.
  • 为了研究探头脉冲的光谱动力学传播通过材料与突如其来的折射率变化诱导调制器脉冲.
  • 探索ENZ材料在产生和控制超快速光学效果方面的潜力.

主要方法:

  • 一个实验设置被设计用于研究探测器光脉冲通过样品的传播.
  • 使用强大的调制器脉冲诱导样品的折射率发生快速而显著的变化.
  • 分析探测器脉冲的光谱反应,观察与时间折射相关的红移和蓝移现象.

主要成果:

  • 在单个光学循环模式下成功观察了光学时间折射.
  • 在增加折射率时观察到探头脉冲光谱的红移,然后在放松时观察到蓝移.
  • 发现,当调制器脉冲的时间宽度减少到大约5-6 femtoseconds时,光谱转移的上升时间相对较短.

结论:

  • 这些实验证实了在单个光学周期时间尺度上发生光学时间折射的发生.
  • 这些发现突出了调制器脉冲宽度与光谱变化的时间动态之间的关系.
  • 这些结果为在超短的时间框架中探索基本物理和开发光子时间晶体开辟了道路.