600GHz 里叶成像基于在第二次亚波中检测异质基的成像
Optics express
|December 2, 2023
概括
研究人员开发了一种具有成本效益的富里埃成像技术,使用600 GHz的异质基因检测. 这种方法实现了高动态范围和空间分辨率,克服了传统太赫兹成像的局限性.
科学领域:
- 特拉赫兹 (THz) 图像成像
- 计算机成像成像技术
- 光学和光子学 在光学和光子学.
背景情况:
- 里埃图像从衍射模式重建图像,但THz频率由于波长和功率限制,在分辨率和动态范围之间存在权衡.
- 检测高空间波向量对于分辨率至关重要,但在THz频率下较短的波长会降低辐射功率和动态范围.
研究的目的:
- 开发一个具有高动态范围的高成本有效的富里埃成像系统,用于THz频率.
- 为了克服THz里叶图像中的分辨率-动态范围冲突.
- 为了证明系统的高分辨率成像能力.
主要方法:
- 在第二次次和弦中利用异质子检测,使用连续波 (CW) 600 GHz照明和300 GHz局部振荡器 (LO) 辐射.
- 采用单像素宽带CMOSTeraFET探测器与基板镜头进行波内合.
- 通过通过焦平面对探测器进行光扫描记录了里埃光谱.
主要成果:
- 在600GHz的辐射功率中,仅用56μW的功率达到60dB的动态范围.
- 成功检测到整个可访问的里埃空间光谱.
- 在衍射极限上,其横向空间分辨率大于0.5mm,与平面对平面成像相美.
结论:
- 开发的异质体检测里叶成像系统有效地克服了THz频率的限制.
- 该系统为高动态范围和高分辨率THz成像提供了具有成本效益的解决方案.
- 这种技术为需要在太赫兹频率进行详细成像的应用提供了可行的替代方案.
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