1State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
2State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
3Centre d’Optique, Photonique et Laser et le Département de Physique, Université Laval, Quebec City, Quebec G1V0A6, Canada
Huailiang Xu, Ruxin Li, See Leang Chin. Photoemission mechanisms of methane in intense laser fields[J]. Chinese Optics Letters, 2015, 13(7): 070007
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Fig. 2. Femtosecond laser-induced emission spectra of CH4: 0.1 Torr (bottom), 1 Torr (middle), and 10 Torr (top). The ICCD gate width was set to 500 ns and the ICCD delay time t=−10ns (note that the laser pulse arrives in the interaction region at t=0).
Fig. 3. Decay profile (black line) of the fluorescence emission at 431.2 nm from the A2Δ−X2Δ transition of CH for the pressures at 0.2 Torr and its fit (red line). The insets show the same data but in a semilogarithmic representation.