Effect of laser polarization on molecular emission from femtosecond LIBS

Autor:	Qiuyun Wang, Suyu Li, Mingxing Jin, Yutong Chen, Yitong Liu, Yuanfei Jiang, Anmin Chen
Rok vydání:	2022
Předmět:	Materials science Linear polarization Physics::Optics Laser Emission intensity Waveplate Molecular physics Analytical Chemistry law.invention law Femtosecond Molecule Spectroscopy Circular polarization
Zdroj:	Journal of Analytical Atomic Spectrometry. 37:82-88
ISSN:	1364-5544 0267-9477
DOI:	10.1039/d1ja00308a
Popis:	This study investigated the effect of laser polarization on the molecular bands of femtosecond laser-induced breakdown spectroscopy (LIBS). Results from AlO molecules indicated that the intensities of molecular emission bands under circular polarization in femtosecond LIBS were higher than those under linear polarization. The trend became more evident as laser energy increased. The vibration temperatures at different waveplate angles were also calculated to understand further the effect of laser polarization on the molecular emission signal. Finally, similar research on CN molecules for PMMA targets was carried out. The results showed that the emission intensity of the CN molecule was almost consistent with that of the AlO molecule. The study provided a method to improve the molecular emission signal in femtosecond LIBS with circular laser polarization.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b1475fa89eec9d95425ba6188cc14e89 https://doi.org/10.1039/d1ja00308a Zobrazit plný text záznamu