Development of a Spatial Heterodyne Terahertz Raman Spectrometer with Echelle Gratings
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 ch...
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MDPI AG
2023-01-01
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| Online Access: | https://www.mdpi.com/2076-3417/13/2/967 |
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| author | Yuqi Sun Xiaotian Li Jiri Galantu Qihang Chu Jun Chen Fuguan Li Nan Song Geng Wang Qiliang Ni |
| author_facet | Yuqi Sun Xiaotian Li Jiri Galantu Qihang Chu Jun Chen Fuguan Li Nan Song Geng Wang Qiliang Ni |
| author_sort | Yuqi Sun |
| collection | DOAJ |
| description | 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<sup>−1</sup>. The spectral detection range of a single level of the proposed system is 701.61 cm<sup>−1</sup>. A total of nine levels are used in the system, giving a total spectral detection range of 6314 cm<sup>−1</sup>. 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<sup>−1</sup>) 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. |
| first_indexed | 2024-03-09T13:43:39Z |
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| id | doaj.art-ce6f29a11111400bab3bd672605de2e3 |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T13:43:39Z |
| publishDate | 2023-01-01 |
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| spelling | doaj.art-ce6f29a11111400bab3bd672605de2e32023-11-30T21:04:16ZengMDPI AGApplied Sciences2076-34172023-01-0113296710.3390/app13020967Development of a Spatial Heterodyne Terahertz Raman Spectrometer with Echelle GratingsYuqi Sun0Xiaotian Li1Jiri Galantu2Qihang Chu3Jun Chen4Fuguan Li5Nan Song6Geng Wang7Qiliang Ni8Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaChangchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, ChinaThis 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<sup>−1</sup>. The spectral detection range of a single level of the proposed system is 701.61 cm<sup>−1</sup>. A total of nine levels are used in the system, giving a total spectral detection range of 6314 cm<sup>−1</sup>. 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<sup>−1</sup>) 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.https://www.mdpi.com/2076-3417/13/2/967terahertz Ramanechelle gratingspatial heterodyne spectrometer |
| spellingShingle | Yuqi Sun Xiaotian Li Jiri Galantu Qihang Chu Jun Chen Fuguan Li Nan Song Geng Wang Qiliang Ni Development of a Spatial Heterodyne Terahertz Raman Spectrometer with Echelle Gratings Applied Sciences terahertz Raman echelle grating spatial heterodyne spectrometer |
| title | Development of a Spatial Heterodyne Terahertz Raman Spectrometer with Echelle Gratings |
| title_full | Development of a Spatial Heterodyne Terahertz Raman Spectrometer with Echelle Gratings |
| title_fullStr | Development of a Spatial Heterodyne Terahertz Raman Spectrometer with Echelle Gratings |
| title_full_unstemmed | Development of a Spatial Heterodyne Terahertz Raman Spectrometer with Echelle Gratings |
| title_short | Development of a Spatial Heterodyne Terahertz Raman Spectrometer with Echelle Gratings |
| title_sort | development of a spatial heterodyne terahertz raman spectrometer with echelle gratings |
| topic | terahertz Raman echelle grating spatial heterodyne spectrometer |
| url | https://www.mdpi.com/2076-3417/13/2/967 |
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