Fig. 2: THz emission from Cd3As2 without applying magnetic field.
From: Ultrafast photothermoelectric effect in Dirac semimetallic Cd3As2 revealed by terahertz emission
a The laser intensity dependence of the peak field of emitted THz pulse. The red line is the simulation of power dependence according to the TE response presented in Supplementary Note 5. b Typical THz waveforms excited by laser with different polarized direction. c Typical THz waveforms at different azimuthal angle θ, the thickness gradient is roughly set along y-axis for θ = 0°, with unintentional deviation of θ0. d The azimuthal angle dependence of the peak field of emitted THz pulse, and the red line is the cosinoidal fitting cos (θ+θ0), the deviation (θ0) is 6.2° according to the fitting. Insets in panels (b, c): the schematic illustrations of the corresponding measurements.
