Chinese Optics Letters, Volume. 12, Issue 11, 113201(2014)

Controlling neutral fragmentation yields of methane by femtosecond laser pulses

Huailiang Xu1, Ali Azarm2,3, and See-Leang Chin2
Author Affiliations
  • 1State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
  • 2Centre d'Optique, Photonique et Laser et le Département de Physique, Université Laval, QC G1V0A6, Canada
  • 3College of Optical Sciences, University of Arizona, Tucson, AZ 85721, USA
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    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[J]. Chinese Optics Letters, 2014, 12(11): 113201

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    Paper Information

    Category: Ultrafast Optics

    Received: Jun. 13, 2014

    Accepted: Jul. 16, 2014

    Published Online: Oct. 31, 2014

    The Author Email:

    DOI:10.3788/col201412.113201

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