科研之友
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摘要
The dynamics and propagation effects in attosecond (asec) pulse generation from high-order harmonic generation (HHG) of aligned one-dimensional (1D) H(2)(+) molecules are investigated from numerical solutions of fully coupled Maxwell and time-dependent Schrodinger equations ( Maxwell-TDSEs), in the highly nonlinear nonperturbative regime of laser - molecule interaction. Density, laser-phase and propagation length effects are studied on the total electric field and nonlinear polarization from the Maxwell-TDSE for intense few cycle (800 nm) laser pulses interacting with a 1D H(2)(+) gas. We show how single and double asec pulses can be generated and propagated as a function of the phase of individual harmonics created by ultrashort intense laser pulses in aligned H(2)(+) molecules. We find furthermore extension of maximum HHG plateaux with increasing gas pressure.
- 出版日期2008-2-29
