Figure 3.

Spectra of the THz emission. Spectra of the THz emission from the cruciform SiC mesa-structure at several bias voltages. T ≈ 7 K. The spectra werre corrected for the spectral response of the measurement system, normalized to the emission maximum, and vertically shifted for clarity. The scaling factors are shown in the graph. The figure insert demonstrates the dependencies of the THz emission intensity and the voltage drop on the current through the structure.