Tracking individual electron trajectories in a high harmonic spectrum |
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Authors: | L.E. Chipperfield P.L. Knight J.P. Marangos |
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Affiliation: | Quantum Optics and Laser Science Group, Department of Physics, Blackett Laboratory, Imperial College London, London SW7 2BW, UK |
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Abstract: | The harmonic spectrum generated by a few-cycle laser pulse propagating through a gas jet is calculated. Two complementary atomic response models are used, one based on the time-dependent Schrödinger equation and the other on quantum orbits in which only a single pair of electron trajectories are taken into account. The role played by individual electron trajectories in determining particular features of the spectrum are considered and phase-matching maps are used to help understand their structure. A method based on this connection is proposed for diagnosing the carrier-envelope phase and the pulse duration of the incident laser field. |
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Keywords: | 32.80.Rm 42.65.Ky 42.65.Re |
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