Figure 4.

(a) Refraction angles for the pointing vector (symbols ‘ο’) and wave-vector (solid lines) for GhHC as a function of incidence angle at wavenumber 800 cm⁻¹ for different values of chemical potential of graphene. (b) 2D map of the refraction angles for the pointing vector as a function of wavenumber and incidence angle for μ_c = 0.25 eV. Thickness of graphene and hBN in the unit cell are d₁ = 1 nm and d₂ = 100 nm respectively. The black dashed lines indicate the angle of refraction equal to zero.