论文标题
宽带Terahertz时域光谱和快速FMCW成像：原理和应用
Broadband terahertz time-domain spectroscopy and fast FMCW imaging: principle and applications
论文作者
论文摘要
我们报告了宽带Terahertz时域光谱法（THZ-TDS），该光谱学（THZ-TDS）使二十种振动模式的腺苷核苷能够在1-20 THz的宽频率范围内解析。观察到的腺苷的光谱特征与使用傅立叶变换红外光谱（FTIR）和拉曼光谱法获得的发表光谱非常吻合。这种大大扩展的带宽可提高材料表征能力，因为它提供了有关分子内和分子间振动的光谱信息。此外，我们还报告了低成本频率调制连续波（FMCW）成像系统，该系统的快速测量速度每秒为40,000波形。还使用其出色的渗透能力在76-81 GHz的频率范围内证明了通过纸板的横截面成像能力。我们预计，这两种互补成像技术的整合对于许多现实世界应用是非常可取的，因为它在单个仪器中既提供光谱歧视和渗透能力。
We report a broadband terahertz time-domain spectroscopy (THz-TDS) which enables twenty vibrational modes of adenosine nucleoside to be resolved in a wide frequency range of 1-20 THz. The observed spectroscopic features of adenosine are in good agreement with the published spectra obtained using Fourier Transform Infrared Spectroscopy (FTIR) and Raman spectroscopy. This much-extended bandwidth leads to enhanced material characterization capability as it provides spectroscopic information on both intra-molecular and inter-molecular vibrations. In addition, we also report a low-cost Frequency Modulation Continuous Wave (FMCW) imaging system which has a fast measurement speed of 40,000 waveforms per second. Cross-sectional imaging capability through cardboard has also been demonstrated using its excellent penetration capability at a frequency range of 76-81 GHz. We anticipate that the integration of these two complementary imaging technologies would be highly desirable for many real-world applications because it provides both spectroscopic discrimination and penetration capabilities in a single instrument.
