Fig. 2
From: Graphene controlled Brewster angle device for ultra broadband terahertz modulation
Controlling the Brewster angle by adjusting the conductivity of graphene. The reflection THz time-domain signal under different gate voltages with incident angles of (a) 55, (b) 68, and (c) 75°. d Reflection amplitude as a function of incident angle for the frequency of 0.8 THz. Open symbols represent the experimental amplitude and solid lines show the curve fitting according to Eq. (1). e The fitted conductivity for different gate voltages at the frequency of 0.8 THz (open circles) and the conductivity extracted from the transmission spectrum (red line). f The Brewster angle as a function of gate voltage at different frequencies
