Yingli Liu, Taotao Mu, Shaohua Chen. Research Progress of Shifted Excitation Raman Difference Spectroscopy[J]. Laser & Optoelectronics Progress, 2024, 61(9): 0900003
- Laser & Optoelectronics Progress
- Vol. 61, Issue 9, 0900003 (2024)
Fig. 1. Overview of acetonitrile differential Raman spectroscopy processing steps. (a) Raw spectra at two different excitation wavelengths; (b) differential spectrum; (c) Raman spectrum restored using integral method; (d) ideally, Raman spectrum restored using integral method
Fig. 2. Raman spectra reduced by curve fitting method
Fig. 3. Acetonitrile differential Raman spectra. (a) Raman spectra of acetonitrile excited by 784.5 nm and 785.5 nm wavelengths; (b) deconvolution and restore of Raman spectra
Fig. 4. Workflow of NNLS based spectral reconstruction[15]
Fig. 5. Optical path structure of SERDS instrument. (a) Structure diagram of SERDS with dual-wavelength lasers at 532 nm and 526 nm[37]; (b) structure diagram of SERDS based on external cavity tunable semiconductor laser[38]; (c) optical path of SERDS based on dual-wavelength laser and area array CCD[44]; (d) internal structure diagram of portable SERDS[41]
Fig. 6. Instrument structure diagram of multi-wavelength defluorescence Raman spectrometer[46]
Fig. 7. Raw spectra, difference spectra, and reconstructed spectra of tree pollen and non-tree pollen under excitation at 784‒786 nm wavelength[52]
Fig. 8. Raman spectra of nasopharyngeal tissue in vitro excited at the wavelength of 784.5 nm and 785.2 nm with different detection distances[54]. (a) 5 mm; (b) 10 mm; (c) 15 mm; (d) normalized shifted excitation Raman difference spectroscopy with different detection distances
|
Table 1. Summary of the main Raman bands used in item classification analysis
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20