Fig. 2
From: Ultrafast zero-bias photocurrent and terahertz emission in hybrid perovskites
Wavelength dependent contributions of circular and linear polarization sensitive photocurrents. Open circles represent the experimental data obtained from the MAPI sample excited with a a second-harmonic femtosecond Ti:Sa laser (390 nm) and CW laser diodes operating at 532 nm (b) and 650 nm (c). The photocurrents demonstrate different behaviour when the sample is excited from the front (lighter colour) and back (darker colour) sides. The corresponding percentile contributions of different types of photocurrents extracted from fitting are shown as bar plots on figures (d-f). Coefficients C, L1, and L2 are the fitting parameters from Eq. (2). Fitting is shown with solid lines
