A comparative study of THz spectra
A comparative study of THz spectra
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太赫兹光谱的比较研究
DOI：
10.2183/pjab.81.20
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
T. Tanno
中科院分区：
文献类型：
--
作者：
J. Nishizawa;K. Suto;Tetsuo Sasaki;T. Tanno
利用基于GaP晶体差频产生的频率可调的THz波发生器，我们构建了两种类型的THz谱仪。OPO-SOURCE系统用于高精度测量，以探测THz吸收光谱中的精细结构。该系统具有结构简单、维护方便、成本低等优点，但仍具有足够的分辨率，可用于固体或液体的室温观测。与FT-IR或TDS测定的糖的吸收光谱相比较，我们的光谱仪在频率范围和分辨率上具有优势，足以记录子峰，可以作为有机化合物的结构缺陷进行分析。(作者：西泽纯一，M.J.A.)
We have constructed two types of THz spectrometers using the frequency-tunable THz wave generators based on difference-frequency generation (DFG) in GaP crystal. The OPO-source system is for high accuracy measurement to detect fine structures in THz absorption spectra. The Cr:F-source system has merit in simple structure, easy maintenance and low-cost, but still has sufficient resolution for room temperature observation of solids or liquids. Comparing the absorption spectra of saccharides measured with these spectrometers and those measured with FT-IR or TDS, our spectrometers have superiority in frequency range and resolution, enough to record sub peaks, which can be analyzed as structural defects in organic compounds. (Contributed by Jun-ichi NISHIZAWA, M.J.A.)