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 (A2? ? X2?) 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.

© 2014 Chinese Optics Letters

Two-pulse laser fragmentation/laser-induced fluorescence of nitrobenzene and nitrotoluene vapors

Sergei M. Bobrovnikov, Evgeny V. Gorlov, Viktor I. Zharkov, Yury N. Panchenko, and Aleksey V. Puchikin
Appl. Opt. 58(27) 7497-7502 (2019)

Detection of neutral and ionic reaction mechanisms in molecular clusters

Jhobe Steadman, Eric W. Fournier, and Jack A. Syage
Appl. Opt. 29(33) 4962-4968 (1990)

Strong-field photoionization/dissociation of vinyl bromide in near-infrared and ultraviolet femtosecond laser fields

Yang Liu, Shen He, Longxing Zhou, Qi Chen, Yiwen Zhao, Tian Sun, Xingchen Shen, Tao Yu, Hang Lv, and Haifeng Xu
J. Opt. Soc. Am. B 40(7) 1851-1856 (2023)

Neutrals ejection in intense femtosecond laser ablation

Haofeng Hu, Xiaolei Wang, and Hongchen Zhai
Opt. Lett. 36(2) 124-126 (2011)

Mitochondrial swelling and restorable fragmentation stimulated by femtosecond laser

Fan Shi, Hao He, Yintao Wang, Dayong Liu, Minglie Hu, and Chingyue Wang
Biomed. Opt. Express 6(11) 4539-4545 (2015)