Limits of long wavelength High Harmonic Generation

[摘要] (cont.) It was found that longer wavelength have smaller efficiencies (neglecting phase matching condition). Finally, the harmonic spectrum of Hydrogen driven by 800 nm pulse predicted by analytic Three Step Model (TSM) has been compared with the harmonic spectrum generated by numerical solution of time-dependent Schrödinger equation. It was found, as the current theories predict, that TSM becomes less reliable as the Keldysh Parameter increases. It was also observed that for low harmonic energies, the TSM spectrum deviates from the numerical spectrum by many orders of magnitude.

[发布机构] Massachusetts Institute of Technology