Figure 3
From: Terahertz wave modulation enhanced by laser processed PVA film on Si substrate
Experimental THz-TDS amplitude transmission spectra of (a) Bare Si, (b) PVA/Si without laser heating, (c) LP-PVA/Si samples under the different pump powers. These data are calculated from the results shown in Fig. 2. (d) Experimental modulation depth curves of bare Si, PVA/Si, and LP-PVA/Si change with the increase of pump power density.
