Electronic Raman bands of neodymium and a new mechanism for Raman enhancement
Xu, YZ; Wu, JG; Sun, WX; Tao, DL; Song, ZF; Weng, SF; Xu, ZH; Xu, DF; Xu, GX
AbstractStrong electronic Raman bands corresponding to the transition between I-4(9/2) and I-4(11/2) manifolds of Nd3+ are observed in the FT-Raman spectrum of neodymium complex because of the Raman enhancement effect. Neither resonant enhancement nor surface enhancement accounts for the Raman enhancement observed here. We propose a new mechanism of Raman enhancement (Feed-bach Raman Enhancement) the YAG laser excites the final state of Raman transition. (I-4(11/2) of Nd3+) to the F-4(3/2) state and causes a significant decrease of the population of Nd3+ at the I-4(11/2) state. This renders the population ratio of Nd3+ at I-4(9/2) and I-4(11/2) deviates from the value required by the. Boltzmann's law. To restore equilibrium, Raman scattering is enhanced so that more Nd3+ ions are brought from I-4(9/2) to I-4(11/2). This hypothesis-gets support from the temperature-variable FT-Raman spectroscopic results. Additionally; obvious differences between Stokes and Anti-stokes Raman spectrum of Nd3+ support our mechanism too.
KeywordRaman Spectrum Neodymium Feed-back Enhancement
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WOS IDWOS:000182543000035
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorXu, YZ
Affiliation1.Peking Univ, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
3.Peking Univ, Dept Phys, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Xu, YZ,Wu, JG,Sun, WX,et al. Electronic Raman bands of neodymium and a new mechanism for Raman enhancement[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2003,24(2):335-336.
APA Xu, YZ.,Wu, JG.,Sun, WX.,Tao, DL.,Song, ZF.,...&Xu, GX.(2003).Electronic Raman bands of neodymium and a new mechanism for Raman enhancement.CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,24(2),335-336.
MLA Xu, YZ,et al."Electronic Raman bands of neodymium and a new mechanism for Raman enhancement".CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE 24.2(2003):335-336.
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