Abstract
The inhomogeneous field effect on high-order harmonic generation of H2+ driven by the polarization gate scheme is theoretically investigated. The harmonic emission process is explored by the electron probability density evolution. The research shows that it is the influence on the electron movement imposed by inhomogeneous field that causes the quantum paths to be manipulated. In view of these simulations, only one short quantum path is significantly enhanced but others are suppressed by selecting optimized inhomogeneous factor ε and laser pulse duration. Meanwhile, a ultrabroad supercontinuum up to 300 orders harmonic plateau and an isolated 48-as pulse are generated.
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