Fig. 3
From: Ultrafast zero-bias photocurrent and terahertz emission in hybrid perovskites
Polarization-dependent coherent terahertz emission from unbiased MAPI at room temperature. Excitation of the MAPI sample with femtosecond laser pulses leads to efficient emission of THz radiation. The typical transient waveforms of the emitted THz radiation detected with a GaP EO crystal at the far field under oblique excitation with linear (black curve), right circular (red curve), and left circular (blue curve) excitation beam polarization is shown in a. Typical THz frequency spectra obtained by Fourier transform of the transient waveforms for the case of right circular (red curve) and left circular (blue curve) polarizations are shown in b. (c) Photon-polarization dependence of the emitted THz field amplitude and fitting with Eq. (2) are shown with open circles and solid line correspondingly. The fitting results are shown in the bar plot on the right part of c
