E Lorin et al 2008 New J. Phys. 10 025033 doi:10.1088/1367-2630/10/2/025033
Attosecond pulse generation from aligned molecules—dynamics and propagation in H2+
Focus on Attosecond PhysicsE Lorin1,3, S Chelkowski2 and A D Bandrauk1,2
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The dynamics and propagation effects in attosecond (asec) pulse generation from high-order harmonic generation (HHG) of aligned one-dimensional (1D) H2+ molecules are investigated from numerical solutions of fully coupled Maxwell and time-dependent Schrödinger 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 H2+ 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 H2+ molecules. We find furthermore extension of maximum HHG plateaux with increasing gas pressure.
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Issue 2 (February 2008)
Received 17 September 2007
Published 29 February 2008
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Attosecond pulse generation from aligned molecules—dynamics and propagation in H2+
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