期刊
CHINESE PHYSICS B
卷 29, 期 6, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/ab84dc
关键词
LIBS; femtosecond laser; laser polarization; spectral enhancement
资金
- National Natural Science Foundation of China [11674128, 11674124, 11974138]
- Jilin Provincial Scientific and Technological Development Program, China [20170101063JC]
- Scientific and Technological Research Project of the Education Department of Jilin Province, China [JJKH20200937KJ]
Laser-induced breakdown spectroscopy (LIBS) is an important technique which is widely used to analyze element composition. In order to improve the sensitivity of LIBS, much effort has been made to enhance the spectral intensity of LIBS by proposing a number of methods. In addition, we find that laser polarization has great influence on the emission intensity of femtosecond LIBS. By comparing the emission intensity of femtosecond LIBS in the circular polarization with that in the linear polarization, the spectral intensity in the case of circular polarization is stronger than that in the case of linear polarization. Moreover, this phenomenon is more obvious as laser energy increases. The polarization plays an important role in LIBS signal intensity. Based on the observation, the enhanced mechanism of the laser polarization for the spectral intensity is discussed in this paper, which will be helpful in spectral analysis and component analysis.
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