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Experimental setup: L1, L2, and L3, lenses. Inset in (a), SC generated in the Beam 1 arm; , , and are the Beam 1, Beam 2, and grating wave vectors, respectively. In (b), IF, interference filter at 400 nm.
(a) Photograph of the diffracted SC on a paper screen placed in the Beam 2 path. (b) Simulated intensity patterns of the diffracted SC for different values of the grating thickness. In all pictures Beam 2 appears as a bright white-bluish spot.
Measured spectra: SC incident on the grating (dashed-dotted curve) and diffracted SC (solid curve). Dashed curve represents the best fit to the diffracted spectrum with the calculated spectral selectivity curve.
(a) Diffracted SH signal as a function of the delay of SH probe pulse with respect to the Beam 1/Beam 2 pulses. Inset: Diffracted SH signal vs the delay between Beam 1 and Beam 2 pulses at a fixed SH pulse delay of 1 ps. (b) Normalized diffraction efficiency of the SH wave as a function of the ratio of the Beam 2 energy to the Beam 1 energy: experimental data (dots) and theoretical fit (solid curve) assuming an eight-photon ionization process.
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