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首页> 外文期刊>Scientific reports. >Real-time broadband terahertz spectroscopic imaging by using a high-sensitivity terahertz camera
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Real-time broadband terahertz spectroscopic imaging by using a high-sensitivity terahertz camera

机译：使用高灵敏度Terahertz相机进行实时宽带太赫兹光谱成像

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摘要

Terahertz (THz) imaging has a strong potential for applications because many molecules have fingerprint spectra in this frequency region. Spectroscopic imaging in the THz region is a promising technique to fully exploit this characteristic. However, the performance of conventional techniques is restricted by the requirement of multidimensional scanning, which implies an image data acquisition time of several minutes. In this study, we propose and demonstrate a novel broadband THz spectroscopic imaging method that enables real-time image acquisition using a high-sensitivity THz camera. By exploiting the two-dimensionality of the detector, a broadband multi-channel spectrometer near 1?THz was constructed with a reflection type diffraction grating and a high-power THz source. To demonstrate the advantages of the developed technique, we performed molecule-specific imaging and high-speed acquisition of two-dimensional (2D) images. Two different sugar molecules (lactose and D-fructose) were identified with fingerprint spectra, and their distributions in one-dimensional space were obtained at a fast video rate (15 frames per second). Combined with the one-dimensional (1D) mechanical scanning of the sample, two-dimensional molecule-specific images can be obtained only in a few seconds. Our method can be applied in various important fields such as security and biomedicine.
机译：太赫兹（Thz）成像具有强大的应用潜力，因为许多分子在该频率区域中具有指纹光谱。 THZ区域的光谱成像是充分利用这种特性的有希望的技术。然而，传统技术的性能受到多维扫描的要求的限制，这意味着几分钟的图像数据采集时间。在本研究中，我们提出并展示了一种新颖的宽带THz光谱成像方法，其能够使用高灵敏度THz相机进行实时图像采集。通过利用检测器的二维性，通过反射型衍射光栅和高功率THz源构建宽带多通道光谱仪。为了证明开发技术的优点，我们对二维（2D）图像的分子特异性成像和高速采集进行了特定的成像和高速获取。用指纹光谱鉴定出两种不同的糖分子（乳糖和D-果糖），并且以快速的视频速率（每秒15帧）获得它们在一维空间中的分布。结合样品的一维（1D）机械扫描，仅在几秒钟内仅获得二维分子特异性图像。我们的方法可以应用于各种重要领域，如安全性和生物医学。

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