Preparation and Preliminary Nonlinear Optical Properties of BiFeO₃ Nanocrystal Suspensions from a Simple, Chelating Agent-Free Precipitation Route

Figure 5

(a) Linear variation of the SH intensity according to the BiFeO₃ nanocrystal concentration at 1064 nm excitation. (b) Spectrally resolved trace confirming the only detection of SH and TH when the excitation wavelength is shifted to 1250 nm. Inset: quadratic dependence of the SH signal at 625 nm according to the excitation intensity.

(a)

(b)