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Raman and Photoluminescence Spectroscopy with a Variable Spectral Resolution

Pavić, Ivan; Šoda, Joško; Gašparić, Vlatko; Ivanda, Mile (2021) Raman and Photoluminescence Spectroscopy with a Variable Spectral Resolution. Sensors, 21 (23). ISSN 1424-8220

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Raman and photoluminescence (PL) spectroscopy are important analytic tools in materials science that yield information on molecules’ and crystals’ vibrational and electronic properties. Here, we show results of a novel approach for Raman and PL spectroscopy to exploit variable spec- tral resolution by using zoom optics in a monochromator in the front of the detector. Our results show that the spectral intervals of interest can be recorded with different zoom factors, significantly reducing the acquisition time and changing the spectral resolution for different zoom factors. The smallest spectral intervals recorded at the maximum zoom factor yield higher spectral resolution suitable for Raman spectra. In contrast, larger spectral intervals recorded at the minimum zoom factor yield the lowest spectral resolution suitable for luminescence spectra. We have demonstrated the change in spectral resolution by zoom objective with a zoom factor of 6, but the perspective of such an approach is up to a zoom factor of 20. We have compared such an approach on the prototype Raman spectrometer with the high quality commercial one. The comparison was made on ZrO2 and TiO2 nanocrystals for Raman scattering and Al2O3 for PL emission recording. Beside demonstrating that Raman spectrometer can be used for PL and Raman spectroscopy without changing of grating, our results show that such a spectrometer could be an efficient and fast tool in searching for Raman and PL bands of unknown materials and, thereafter, spectral recording of the spectral interval of interest at an appropriate spectral resolution.

Item Type: Article
Uncontrolled Keywords: Raman spectrometer ; photoluminescence ; spectral resolution ; zoom lens
Subjects: TECHNICAL SCIENCES > Electrical Engineering
Divisions: Division of Materials Physics
Project titleProject leaderProject codeProject type
Potpora vrhunskim istraživanjima Centra izvrsnosti za napredne materijale i senzoreIvanda, Mile; Jakšić, Milko; Stipčević, Mario; Kralj, MarkoKK.
Istraživanja inovativnih tehnologija u pomorstvu uz opremanje znanstvenog laboratorija Pomorskog fakultetaŠoda, JoškoPFST-2019-01VLASTITA-SREDSTVA
Depositing User: Sofija Konjević
Date Deposited: 29 Dec 2021 09:39
DOI: 10.3390/s21237951

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