Figure 3: Characteristics of ultrafast optical generation and detection processes.
From: Giant ultrafast photo-induced shear strain in ferroelectric BiFeO3
(a) Example of pump fluence dependence of the LA and TA mode for grain 3 (pump polarization dependence is given in inset). (b) Probe wavelength dependence of the amplitude of both TA and LA modes. For a clarity of comparisons, the LA and TA signal amplitudes are normalized by their minimum detected values. The typical error bar on the acoustic mode amplitude is given by the solid vertical segment.
