Chinese Optics Letters, Volume. 12, Issue 11, 113201(2014)
Controlling neutral fragmentation yields of methane by femtosecond laser pulses
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.
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Huailiang Xu, Ali Azarm, See-Leang Chin, "Controlling neutral fragmentation yields of methane by femtosecond laser pulses," Chin. Opt. Lett. 12, 113201 (2014)
Category: Ultrafast Optics
Received: Jun. 13, 2014
Accepted: Jul. 16, 2014
Published Online: Oct. 31, 2014
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