We show that a returning electron wave packet in high-order harmonic generation (HHG) with midinfrared laser pulses converges to a universal limit for a laser wavelength above about 3µm. The results are consistent among the different methods: a numerical solution of the time-dependent Schrödinger equation, the strong-field approximation, and the quantum orbits theory. We further analyze how the contribution from different electron "trajectories" survives the macroscopic propagation in the medium. Our result thus provides a new framework for investigating the wavelength scaling law for the HHG yields.
A. Le et al., "Universality of Returning Electron Wave Packet in High-Order Harmonic Generation with Midinfrared Laser Pulses," Physical Review Letters, vol. 113, no. 3, American Physical Society (APS), Jul 2014.
The definitive version is available at https://doi.org/10.1103/PhysRevLett.113.033001
Keywords and Phrases
Laser Pulses, Dinger Equation; Electron Wave Packet; High Order Harmonic Generation; Laser Wavelength; Mid-Infrared Laser Pulse; Numerical Solution; Quantum Orbits; Strong-Field Approximations, Harmonic Generation, Titanium, Chemistry; Electromagnetic Radiation; Electron; Infrared Radiation; Laser; Quantum Theory; Radiation Scattering, Electromagnetic Radiation; Electrons; Infrared Rays; Lasers; Quantum Theory; Scattering, Radiation; Titanium
International Standard Serial Number (ISSN)
Article - Journal
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