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- W2003705863 abstract "We investigate theoretically the high-order harmonic generation from a one-dimensional model of the helium ion in a two-color laser field synthesized by adding a relatively weak subharmonic laser pulse to a $800text{ensuremath{-}}mathrm{nm}$ laser pulse. The initial states of the helium ion are prepared as the ground state and a coherent superposition state, respectively. Numerical results show evident advantages of using the coherent superposition state to enhance the harmonic generation efficiency. When the phase of the subharmonic pulse is properly shifted with respect to the fundamental pulse, both an ultrabroad xuv supercontinuum spectrum and enhancement of high-order harmonic emission can be observed. By superposing a properly selected range of the harmonic spectrum, the possibility of generating intense pulses that can be as short as $45phantom{rule{0.3em}{0ex}}mathrm{as}$ is demonstrated." @default.
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- W2003705863 date "2008-10-08" @default.
- W2003705863 modified "2023-09-26" @default.
- W2003705863 title "Enhancement of high-order harmonic emission and intense sub-<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mn>50</mml:mn><mml:mtext>−</mml:mtext><mml:mi>as</mml:mi></mml:mrow></mml:math>pulse generation" @default.
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- W2003705863 doi "https://doi.org/10.1103/physreva.78.041402" @default.
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