Typical temporal evolution of normalized EFISH signals during the first 60 s originating from intrinsic i-Si/SiO2 and boron doped p+-Si/SiO2 interfaces under fs laser oscillator irradiation (cf. Ref. 5 ); inset: traces recorded over 500 s visualizing the EFISH signal normalization.
Temporal evolution of EFISH signals for the first 100 s originating from the p+-Si/SiO2 sample for six incident intensities : 35, 45, 60, 85, 100, and 115 GW/cm2 at 782.8 nm central wavelength; the solid lines are fitting curves according to Eq. (4) ; also cf. Refs. 5 and 9 . The arrows highlight values as used in Fig. 3 .
EFISH signal as a function of incident peak intensity for six fs laser wavelengths 741.2 nm ≤ λ ≤ 801.0 nm; lines: slope n of log-log diagrams related to power law .
Exponent n (full circles, down-triangle from Ref. 15 , and up-triangle from Ref. 5 ) of power law as a function of the exciting fs laser wavelength (lower abscissa scale) with a Lorentzian fit to the data; the related two-photon energy 2hν (upper abscissa scale) together with the shielding parameter γ = 2 – n(λ) values (filled squares); empty squares are the 2hν dependent SHG yields adapted from Fig. 1 of Ref. 12 .
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