Electronic Raman bands of neodymium and a new mechanism for Raman enhancement

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	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
刊名	CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
	2003-02-01
卷号	24 期号:2 页码:335-336
关键词	Raman Spectrum Neodymium Feed-back Enhancement
ISSN号	0251-0790
英文摘要	Strong 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.
语种	英语
出版者	HIGHER EDUCATION PRESS
WOS记录号	WOS:000182543000035
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/80845]
专题	中国科学院化学研究所
通讯作者	Xu, YZ
作者单位	1.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
推荐引用方式 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.