| Autor: |
Yuqi Sun, Xiaotian Li, Jiri Galantu, Qihang Chu, Jun Chen, Fuguan Li, Nan Song, Geng Wang, Qiliang Ni |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Applied Sciences, Vol 13, Iss 2, p 967 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2076-3417 |
| DOI: |
10.3390/app13020967 |
| Popis: |
This paper introduces an echelle grating spatial heterodyne terahertz Raman spectrometer (E-SHTRS) that combines echelle gratings with spatial heterodyne terahertz Raman spectroscopy technology by replacing the gratings on the interference arms with 36 gr/mm echelle gratings. Echelle gratings are characterized by high diffraction levels and multi-level simultaneous diffraction capability, giving the E-SHTRS higher spectral resolution and a wider detection band range than the conventional spectrometer. The system’s resolution can reach 1.37 cm−1. The spectral detection range of a single level of the proposed system is 701.61 cm−1. A total of nine levels are used in the system, giving a total spectral detection range of 6314 cm−1. Using this system, terahertz Raman spectroscopy of organic acid samples was performed, some food additives and medicines were measured, and a salicylic acid aqueous solution was measured with a minimum measurable concentration of 0.01 mol/L. In addition, the samples were detected over a wide band (10–5131 cm−1) to acquire more complete spectral information. These experiments verify that the E-SHTRS offers good detection performance and has a wide range of possible applications, including a theoretical support role in food safety, biomedicine, environmental protection, and other fields. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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