发表机构
Research Center for Non-Destructive Testing; Johannes Kepler University（无损检测研究中心; 约翰内斯·开普勒大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文实现了一种无扫描量子傅里叶变换中红外显微光谱仪，无需扫描延迟即可在100毫秒内获取光谱，并展示了其在固体、表面及浑浊介质中的高光谱成像能力。
AI 中文摘要
量子红外（IR）光谱是一种基于非线性干涉测量和未探测光子量子传感的新技术。在该方法中，光谱上远分离的关联光子对分别用于探测和传感。因此，探测波长域（中红外）与检测光谱范围（近红外）显著不同，这实现了散粒噪声限制且成本有效的传感方案，对应用计量学具有吸引力。在本文中，我们实现并采用了一台定制的无扫描量子傅里叶变换中红外（sQFTIR）显微光谱仪，用于固体和界面的化学表征与分析。sQFTIR系统采用光谱域采集，无需扫描光学延迟。这导致增强的灵敏度和短测量时间，因此能够在100毫秒内快速获取光谱，覆盖从3000 cm$^{-1}$到2400 cm$^{-1}$的光谱带。我们方法的能力通过干燥药物（金表面上的胰岛素）的高光谱中红外成像以及对钞票上安全特征的调查得到展示。此外，我们展示了通过浑浊陶瓷介质的高光谱成像和光谱分析。
英文摘要
Quantum infrared (IR) spectroscopy is a novel technique based on nonlinear interferometry and quantum sensing with undetected photons. In this approach, spectrally far-separated correlated photon pairs are used for detection and probing, respectively. Hence, the probing wavelength domain (mid-IR) is substantially different from the detection spectral range (near-IR), which enables shot-noise-limited and cost-effective sensing schemes attractive for applied metrology. In this paper, we implement and employ a custom-built scanless quantum Fourier-transform mid-IR (sQFTIR) microspectrometer for chemical characterization and analysis of solids and interfaces. The sQFTIR system employs spectral-domain acquisition, without the need to scan the optical delay. This results in enhanced sensitivity and short measurement times and therefore enables rapid spectral acquisitions in 100~ms spanning a spectral band from 3000 cm$^{-1}$ - 2400 cm$^{-1}$. The capabilities of our approach are demonstrated for hyperspectral mid-IR imaging of dried pharmaceuticals (insulin on a gold surface) and investigation of a security feature on a banknote. Furthermore, we demonstrate hyperspectral imaging and spectroscopy through a turbid ceramic medium.
Comments8 pages, 4 figures
