Li Xurong, Li Jingxi, Li Yuhang, Ozcan Aydogan, Jarrahi Mona
Department of Electrical & Computer Engineering, University of California Los Angeles (UCLA), Los Angeles, CA, 90095, USA.
California NanoSystems Institute (CNSI), University of California Los Angeles (UCLA), Los Angeles, CA, 90095, USA.
Light Sci Appl. 2023 Sep 15;12(1):233. doi: 10.1038/s41377-023-01278-0.
Many exciting terahertz imaging applications, such as non-destructive evaluation, biomedical diagnosis, and security screening, have been historically limited in practical usage due to the raster-scanning requirement of imaging systems, which impose very low imaging speeds. However, recent advancements in terahertz imaging systems have greatly increased the imaging throughput and brought the promising potential of terahertz radiation from research laboratories closer to real-world applications. Here, we review the development of terahertz imaging technologies from both hardware and computational imaging perspectives. We introduce and compare different types of hardware enabling frequency-domain and time-domain imaging using various thermal, photon, and field image sensor arrays. We discuss how different imaging hardware and computational imaging algorithms provide opportunities for capturing time-of-flight, spectroscopic, phase, and intensity image data at high throughputs. Furthermore, the new prospects and challenges for the development of future high-throughput terahertz imaging systems are briefly introduced.
许多令人兴奋的太赫兹成像应用，如无损评估、生物医学诊断和安全筛查，由于成像系统的光栅扫描要求，其成像速度非常低，在实际应用中一直受到限制。然而，太赫兹成像系统的最新进展大大提高了成像通量，并使太赫兹辐射从研究实验室走向实际应用的前景更加广阔。在此，我们从硬件和计算成像的角度回顾太赫兹成像技术的发展。我们介绍并比较了使用各种热、光子和场图像传感器阵列实现频域和时域成像的不同类型硬件。我们讨论了不同的成像硬件和计算成像算法如何为高通量捕获飞行时间、光谱、相位和强度图像数据提供机会。此外，还简要介绍了未来高通量太赫兹成像系统发展的新前景和挑战。
