Figure 7
From: Electrical terahertz modulator based on photo-excited ferroelectric superlattice
Plots of extracted parameter w0 of the two ferroelectric superlattices as function of electric voltages. The black square represented the data for the ferroelectric superlattice without optical pump, the red circle represented the data with the optical power P = 200 mW, the blue triangle represented data with the optical power P = 400 mW.
