Photoemission mechanisms of methane in intense laser fields

Huailiang Xu; Ruxin Li; See Leang Chin

doi:10.3788/COL201513.070007

Chinese Optics Letters, Volume. 13, Issue 7, 070007(2015)

Photoemission mechanisms of methane in intense laser fields

Huailiang Xu^1,2、*, Ruxin Li^2、**, and See Leang Chin^2,3、***

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

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Figures & Tables(4)

Fig. 1. Experimental setup. L1: f=30 cm; L2: f=20 cm; L3: f=10 cm.

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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=−10 ns (note that the laser pulse arrives in the interaction region at t=0).

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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.

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Fig. 4. Decay rate k (1/τ1) vs pressure.

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Huailiang Xu, Ruxin Li, See Leang Chin, "Photoemission mechanisms of methane in intense laser fields," Chin. Opt. Lett. 13, 070007 (2015)

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