Chinese Optics Letters, 2014, 12 (11): 113201, Published Online: Oct. 31, 2014  

Controlling neutral fragmentation yields of methane by femtosecond laser pulses Download: 528次

Author Affiliations
1 State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
2 Centre d'Optique, Photonique et Laser et le Département de Physique, Université Laval, QC G1V0A6, Canada
3 College of Optical Sciences, University of Arizona, Tucson, AZ 85721, USA
Abstract
We demonstrate the control of neutral fragmentation of methane (CH4) induced by a Ti:sapphire intense laser pulse (800 nm, 40 fs) by using a pump–probe spectroscopy. Enhancement of the fluorescence emission from the neutral radical CH (A2Δ → X2Π) induced by the intense laser field (~1014 W/cm2) is observed when the wavelength of the probe laser pulse is tuned to 400 nm. The phenomena are explained based on excitation enhancement of the super-excited state of the parent molecule resulting in an increase in neutral dissociation of the methane molecules.

Huailiang Xu, Ali Azarm, See-Leang Chin. Controlling neutral fragmentation yields of methane by femtosecond laser pulses[J]. Chinese Optics Letters, 2014, 12(11): 113201.

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