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. Author manuscript; available in PMC: 2013 Nov 12.
Published in final edited form as: J Opt Soc Am B. 2013 Jan 1;30(1):10.1364/JOSAB.30.000219. doi: 10.1364/JOSAB.30.000219

Fig. 3.

Fig. 3

(Color online) SFG spectra recorded at around 1600 cm−1 at different delay times between IR and 800 nm beams. The vertical line at peak maximum is a guide to the eye for comparing resonant and non-resonant signals. The inset shows background suppressed SFG spectra (231 fs) in air and in 0.1 M NaOH.