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Optimization of high-order harmonic generation by genetic algorithm and wavelet time-frequency analysis of quantum dipole emission
Chu, Xi Chu, Shih-I
Chu, Xi
Chu, Shih-I
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Abstract
We present an ab initio three-dimensional quantum study of the coherent control of high-order harmonic generation (HHG) processes in intense pulsed laser fields by means of the genetic algorithm optimization of the laser-pulse amplitude and phase. Accurate time-dependent wavefunction and HHG power spectrum are obtained by the time-dependent generalized pseudospectral method and wavelet transform is used to obtain the dynamical phase associated with the dipole-emission time profile. It is shown that “intra-atomic” dynamical phase matching on the sub-optical cycle, attosecond, time scale can be achieved, leading to nearly perfect constructive interference between different returning electronic wave packets and marked improvement in both emission intensity and purity of a given harmonic order.
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This is the published version, also available here: http://dx.doi.org/10.1103/PhysRevA.64.021403.
Date
2001-07-13
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American Physical Society
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Chu, Shih-I. & Xi, Chu. "Optimization of high-order harmonic generation by genetic algorithm and wavelet time-frequency analysis of quantum dipole emission." Phys. Rev. A 64, 021403(R) – Published 13 July 2001. http://dx.doi.org/10.1103/PhysRevA.64.021403.