High-order harmonic generation with a two-color laser pulse |
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Authors: | Luo Lao-Yong Du Hong-Chuan and Hu Bi-Tao |
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Institution: | School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China |
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Abstract: | We theoretically investigate the electron dynamics of the high-order harmonics generation process by combining a near-infrared 800 nm driving pulse with a mid-infrared 2000 nm control field.We also investigate the emission time of harmonics using time-frequency analysis to illustrate the physical mechanisms of high-order harmonic generation.We calculate the ionization rate using the Ammosov-Delone-Krainov model and interpret the variations in harmonic intensity for different control field strengths and delays.We find that the width of the harmonic plateau can be extended when the control electric field is added,and a supercontinuum from 198 to 435 eV is generated,from which an isolated 61-as pulse can be directly obtained. |
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Keywords: | high-order harmonic generation attosecond pulse |
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