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Dependence of the emitted THz waves on the photon energy of pump light
(A) THz EO signals S(t) under excitation of linearly polarized light at different wavelengths.
(B) The peak value of photocurrent JMax (at t = 0 ps) as a function of the excitation photon energy. The error bars in B are the standard deviation of the experimental data.
(C and D) Schematic band diagram near M and Γ points.
