Terahertz Raman Measurements Using a Spatial Heterodyne Raman Spectrometer
| Autor: | Yuqi Sun, Xiaotian Li, Jiri Galantu, Qihang Chu, Jun Chen, Zhongkai Liu, Xiaotao Mi, Xuefeng Yao, Pan Li |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Applied Sciences, Vol 11, Iss 17, p 8094 (2021) |
| Druh dokumentu: | article |
| ISSN: | 11178094 2076-3417 |
| DOI: | 10.3390/app11178094 |
| Popis: | We propose a method of measuring the terahertz (THz) Raman spectra of a material. As Raman spectroscopy is a measurement of the relative frequency spectrum relative to the frequency of the excitation source, sometimes it is not necessary to use an expensive THz source and THz detector. Instead, an ultraviolet, visible, or infrared excitation source and corresponding detector can be used. A combination of prisms and gratings is used to widen the field of view at high resolution. The resolution of the system is 4.945 cm−1 (0.149 THz), and the spectral range is 2531.84 cm−1 (75.963 THz). We measured the THz Raman spectra of solid powder, aqueous solutions, and mixtures, and studied the effects of environment, container material, and time of measurement on the spectra. The results show that the system is not significantly affected by interference from the water environment and has good stability and repeatability. This method can be applied in many fields such as material detection and environmental protection. |
| Databáze: | Directory of Open Access Journals |
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