Optimization of attosecond pulse generation
Phys. Rev. Lett. , Volume 93 - Issue Article number: 163901 p. 1- 4
The generation of attosecond pulses by superposition of high harmonics relies on their synchronization in the emission. Our experiments in the low-order, plateau, and cutoff regions of the spectrum reveal different regimes in the electron dynamics determining the synchronization quality. The shortest pulses are obtained by combining a spectral filtering of harmonics from the end of the plateau and the cutoff, and a far-field spatial filtering that selects a single electron quantum path contribution to the emission. This method applies to isolated pulses as well as pulse trains.
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Mairesse, Y, de Bohan, A, Frasinski, L. J, Merdji, H, Ciubotariu-Dinu, L, Monchicourt, P, … Salières, P. (2004). Optimization of attosecond pulse generation. Phys.Rev.Lett., 93(Article number: 163901), 1–4. doi:10.1103/physrevlett.93.163901