宽带红外成像由导向模式共振控制在介电元面的介电元面
Ze Zheng1, Daria Smirnova2, Gabriel Sanderson1
1Advanced Optics and Photonics Laboratory, Department of Engineering, School of Science & Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK.
Light, science & applications
|September 10, 2024
概括
这项研究引入了一个新的非线性成像平台,使用四波混合 (FWM) 来实现宽带红外成像. 这种方法增强了信号转换,克服了先进光学成像应用的先前限制.
科学领域:
- 光子学和纳米技术的使用.
- 非线性光学是非线性光学.
- 地元表面应用程序
背景情况:
- 非线性元表面为红外成像提供了潜力,但其转换效率低,运行频段狭窄.
- 目前用于提高超表面性能的策略往往限制了它们的操作带宽,阻碍了诸如非线性全息和金属镜等应用.
研究的目的:
- 开发一个宽带非线性成像平台,克服现有超表面的狭窄操作带限制.
- 使用四波混合 (FWM) 与束来提高元表面的信号转换效率.
主要方法:
- 引入了一种新的非线性成像平台,采用束来通过四波混合 (FWM) 增强信号转换.
- 设计了一个盘上板元表面,在波长上有引导模式共振,而不是信号或辐射波长.
- 使用超表面平台演示了宽带红外到可见图像的转换.
主要成果:
- 实现了宽带非线性成像对任意的物体使用波长共振的元表面.
- 成功地将广的红外图像频谱 (>1000至4000纳米) 转换为可见光谱.
- 由于FWM的二次强度关系,显示了对高功率信号输入或共振信号特征的减少依赖.
结论:
- 开发的FWM增强的超表面平台使宽带非线性成像成为可能,克服了以前的带宽限制.
- 这一进步显著扩大了金属表面在诸如红外成像和光谱学等领域的适用性.
- 为下一代芯片规模全光红外成像技术铺平了道路.
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