Fig. 1
From: Ultrafast zero-bias photocurrent and terahertz emission in hybrid perovskites
Polarization dependent photocurrent in unbiased MAPI sample at room temperature. Configuration (a) and temporal profiles of photocurrent response measured (b) at different incidence angles (θ = 45o: red colour; θ = −45o: blue colour) in the transversal (φ = 90°) geometry of the experiment. c and d Excitation beam polarization dependence of correspondingly longitudinal (J x , φ = 0°) and transversal (J y , φ = 90°) components of photocurrent response measured at 45° incidence. The excitation beam polarization state is controlled by rotation of the quarter wave-plate with a step of 5 degrees. 45° and 225° angles correspond to left circular polarization; 135° and 315° correspond to right circular polarization. The open circles are the experimental data. The fitting data with function J = J 0 + C·sin(2α) + L1·cos(4α) + L2·sin(4α) are shown with solid lines
