Controlling neutral fragmentation yields of methane by femtosecond laser pulses

被引：7
|
作者：
Xu, Huailiang [1 ]
Azarm, Ali [2 ,3 ,4 ]
Chin, See-Leang [2 ,3 ]
机构：
[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China
[2] Univ Laval, Ctr Opt Photon & Laser, Laval, PQ G1V0A6, Canada
[3] Jilin Univ, Dept Phys, Changchun 130012, Peoples R China
[4] Univ Arizona, Coll Opt Sci, Tucson, AZ 85721 USA
来源：
CHINESE OPTICS LETTERS | 2014年 / 12卷 / 11期
基金：
高等学校博士学科点专项科研基金; 加拿大自然科学与工程研究理事会; 中国国家自然科学基金;
关键词：
DISSOCIATION; MOLECULES;
D O I：
10.3788/COL201412.113201
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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 (A(2)Delta -> X-2 Pi) induced by the intense laser field (similar to 10(14) W/cm(2)) 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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页数：4
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