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We observed the interference spectrum that depends on the carrier-envelope phase using a few-cycle laser pulse. The phenomenon is based on the interference between the second and third harmonics generated from a ZnO thin film.
Two-dimensional multicolored arrays of quadratic spatial solitons and up-converted parametric amplifications are observed through cascaded non-collinear quadratic processes in quadratic media, which can be switched by phase-insensitive weak beam control with second harmonic seeding pulses.
Experiments and computer simulations of high harmonic generation from surface plasmas using femtosecond laser pulses are presented. By increasing the pump intensity above 1019 W/cm2 and varying the plasma scale length the mechanism of harmonic generation are changed.
When the laser field consisting of sub-10-fs fundamental and its second harmonic was used for high harmonic generation, a continuum centered at 30 nm with a spectral bandwidth of 8 nm was obtained with an energy of 10 nJ.
Isolated XUV pulses with a temporal duration of 950 as were characterized by the autocorrelation technique based on two-photon above threshold ionization.
We discuss a regime of high-harmonic generation in waveguide where sub-femtosecond EUV pulses can be generated via a mechanism relatively insensitive to carrier-envelope phase. This method also allows for control over EUV energy and bandwidth.
We demonstrate coherent superposition of quadrupolar two-beam SHG from two glass slides with variable spacing, a step toward quasi-phase matched SHG from isotropic materials.
We have observed ablation patterns on metal surfaces made by focusing high-order harmonics in the soft-X-ray region. The ablation processes are investigated from the intensity dependence.
High-order stimulated Raman scattering was used to generate coherent radiation from 1.49 mum to 330 nm. A probe pulse injected after the pump scattered into 15 intense sidebands with a FWHM from 476 nm to 350 nm.
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