Time-resolved resonance fluorescence spectroscopy for study of chemical reactions in laser-induced plasmas

Lei Liu (1) , Lei Min Deng (1) , Li Sha Fan (1) , Xi Huang (1) , Yao Lu (1) , Xiaokang Shen (1) , Lan Jiang (2) , Jean-François Silvain (3) , Yongfeng Lu (1)

1 Department of Electrical Engineering
2 School of Mechanical Engineering
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

Identification of chemical intermediates and study of chemical reaction pathways and mechanisms in laser-induced plasmas are important for laser-ablated applications. Laser-induced breakdown spectroscopy (LIBS), as a promising spectroscopic technique, is efficient for elemental analyses but can only provide limited information about chemical products in laser-induced plasmas. In this work, time-resolved resonance fluorescence spectroscopy was studied as a promising tool for the study of chemical reactions in laser-induced plasmas. Resonance fluorescence excitation of diatomic aluminum monoxide (AlO) and triatomic dialuminum monoxide (Al2O) was used to identify these chemical intermediates. Time-resolved fluorescence spectra of AlO and Al2O were used to observe the temporal evolution in laser-induced Al plasmas and to study their formation in the Al-O2 chemistry in air.

Domaines: Matériaux

Lei Liu, Lei Min Deng, Li Sha Fan, Xi Huang, Yao Lu, et al.. Time-resolved resonance fluorescence spectroscopy for study of chemical reactions in laser-induced plasmas. Optics Express, 2017, 25 (22), pp.27000-27007. ⟨10.1364/OE.25.027000⟩. ⟨hal-01662370⟩