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电气和全光学可切换的非局部非线性元表面.

Mukesh Sharma1,2, Mai Tal1,2, Cormac McDonnell1,2

  • 1Department of Physical Electronics, Faculty of Engineering, Tel-Aviv University, Tel-Aviv 6779801, Israel.

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|August 16, 2023
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概括
此摘要是机器生成的。

这项研究证明了使用液晶在元表面上的可调节的非线性效应. 研究人员在先进光学设备的第二和生成上取得了显著的电气和光学控制.

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科学领域:

  • 超表面和纳米光子学
  • 非线性光学是非线性光学.
  • 液晶技术 液晶技术

背景情况:

  • 超表面的非局部效应对于光谱选择性和增强的光学相互作用至关重要.
  • 这些效应使得像频率转换这样的非线性现象成为可能,但主动调仍未得到充分探索.
  • 开发可主动调节的非线性光学设备对于传感和信号处理至关重要.

研究的目的:

  • 调查非局部第二和生成 (SHG) 的电气和全光学调制性.
  • 探索液晶 (LCs) 在功能化非线性元表面的使用,以实现动态控制.
  • 为了展示具有可调节的非线性光学特性的新型纳米级半导体设备.

主要方法:

  • 一个非线性元表面的功能化,具有扭曲的阴性液晶 (LC) 层.
  • 激发表面晶格共振以诱导强烈的非局部SHG.
  • 应用电气和全光学刺激来调整非线性响应.

主要成果:

  • 由于LC集成和表面格子共振,出现了强大的非局部SHG.
  • 在共振上显著增强了SHG.
  • 实现了超过25dB的电转换振幅,并观察到SHG中所有光学诱导的相变.

结论:

  • 集成LCs提供了非局部SHG在 metasurfaces中的极大电气和全光学可调性.
  • 这项工作为具有纳米尺度控制的活性非线性光学半导体带来了一个有前途的途径.
  • 证明的动态非局部效应对未来的传感和信号处理应用具有高度相关性.