Figure 4
From: Terahertz wave modulation enhanced by laser processed PVA film on Si substrate
Simulative THz amplitude transmission spectra of (a) Bare Si, (b) PVA/Si, (c) LP-PVA/Si modeled by the different surface photon-generated carrier densities corresponding to the pump powers shown in Figs 2 and 3. (d) Simulative surface carrier density curves of bare Si, PVA/Si, and LP-PVA/Si change with the increase of the pump power density.
